Blog

A pragmatic mix of code, automation, data and infrastructure, with equal respect for running shoes, good food and getting outdoors.
A vintage triptych showing model crates by the sea with a Hugging Face Sun in the sky, a brass-and-teal server machine and a probe instrument receiving a glowing signal.

Local LLM with Hugging Face Models

Serve models locally on CPU and GPU with llama.cpp and vLLM
LLMAIHugging Face
2026/07/23
Moody cellar workshop with Ubuntu crate, laptop and copper brewing apparatus for Homebrew on Linux.

Installing Homebrew on Ubuntu

LinuxUbuntuHomebrew
2026/07/01
The logo for the Massive proxy service.

Massive Browser API

proxyweb scraping
2026/06/17
A room with a potted plant, a picture on the wall and a rug on the floor. The wall is empty where a bookcase could be.

Static and Dynamic Websites

Where does the HTML come from?
web scraping
2026/06/01
The logo for the Byteful proxy service.

Byteful Residential Proxies

proxyweb scraping
2026/05/22
Llama astronaut interacting with Ollama Cloud.

Ollama Cloud

Local Workflow, Remote Model
OllamaLLM
2026/05/10
The logo for the Geonode proxy service.

Geonode Proxies

proxyweb scrapingPython
2026/05/09

Quick and Dirty Ollama on EC2

AWSOllamaLLM
2026/05/06
Llama astronaut mapping the Ollama model universe.

Atlas of the Ollama Universe

OllamaLLM
2026/05/02
The logo for the Massive proxy service.

Massive ASN Targeting

proxyweb scraping
2026/04/27
The logo for the Massive proxy service.

Massive Geotargeting

proxyweb scraping
2026/04/25
The logo for the Massive proxy service.

Massive Proxies

proxyweb scrapingPython
2026/04/18

What’s New in Firefox 149?

Firefoxbrowserweb scraping
2026/03/25
The Google Chrome logo on a blue background.

What’s New in Chrome 144?

browserweb scrapingChrome
2026/01/31
The Firefox logo on an orange gradient background.

What’s New in Firefox 147?

Firefoxbrowserweb scraping
2026/01/24
The Firefox logo on an orange gradient background.

What’s New in Firefox 146?

Firefoxbrowserweb scraping
2025/12/10
The Google Chrome logo on a blue background.

What’s New in Chrome 143?

browserweb scrapingChrome
2025/12/05
The Camoufox logo with a stylised fox head above the word Camoufox.

Camoufox without a Context Manager

PlaywrightCamoufox
2025/12/02
The Tor logo with a stylised onion on a dark purple background.

Installing Tor Browser on Ubuntu

TorUbuntu
2025/12/01
The Firefox logo on an orange gradient background.

What’s New in Firefox 145?

Firefoxweb scraping
2025/11/22
A crowded street market with stalls and shoppers in an old town.

Evaluating a New Job Market Data Feed

RPython
2025/11/10
A blurred spreadsheet overlaid with the Microsoft SharePoint logo.

Downloading from SharePoint

web scraping
2025/10/25
A black pot of vegetable soup on a wooden table.

Accelerating BeautifulSoup Encoding Detection

web scrapingPython
2025/10/18
A Canadian lynx sitting alert on a forest floor.

Cycles in Lynx Numbers

R
2025/10/16
 

What’s happening on the Framebuffer?

2025/07/13
 

Camoufox in Docker

DockerCamoufox
2025/06/11
An elephant footprint in muddy ground with footprints of smaller animals.

Playwright Browser Footprint

Playwrightweb scraping
2025/06/06
An image of three kayak paddlers in triangle formation viewed from in front of the foremost paddler.

Hasler Statistics

kayakR
2025/05/05
A plate of round cookies on a floral blue tablecloth.

Get Cookies from Chrome or Firefox

SeleniumPlaywrightcookiesweb scraping
2025/05/03
A surreal, headless man in a bowler hat and white coat against a cloudy landscape.

Headless Browser Hacks

SeleniumPlaywrightweb scrapingframebufferanti-bot
2025/05/02
The front desk in a stylish hotel. There's a lamp and a vase of yellow flowers.

Webshare Proxies

proxyweb scraping
2025/04/03
A crash test dummy sitting at a computer in a cosy study.

Test a Playwright Web Scraper

web scrapingtestingPlaywright
2025/04/02
A crash test dummy sitting at a computer in a cosy study.

Test a Selenium Web Scraper

web scrapingtestingSelenium
2025/03/31
A grader working on a construction site.

Iterating over a Paginated List of Links

web scraping
2025/02/25
A robot hand using a paint scraper to remove paint from a wall.

Handling HTML Entities and Unicode

web scrapingHTMLUnicode
2025/02/08
A robot hand using a paint scraper to remove paint from a wall.

Scraping JSON-LD Data

web scraping
2025/02/07
A crash test dummy sitting at a computer in a cosy study.

Test a Web Scraper using Patching

web scrapingtestingpytest
2025/01/30
A crash test dummy sitting at a computer in a cosy study.

Test a Web Scraper using Mocking

web scrapingtestingpytest
2025/01/29
A crash test dummy sitting at a computer in a cosy study.

Test a Web Scraper using VCR

web scrapingtesting
2025/01/28
A crash test dummy sitting at a computer in a cosy study.

Test a Web Scraper using Responses

web scrapingtesting
2025/01/27
A crash test dummy sitting at a computer in a cosy study.

Web Scraper Testing

web scrapingtesting
2025/01/26
A robot hand using a paint scraper to remove flaking paint from a wall.

Zyte API Sessions

web scrapingZyte
2025/01/25
A robot hand using an electric scraper on a peeling wall, with a plate of biscuits on the floor nearby.

Zyte API Cookie Management

web scrapingcookiesZyte
2025/01/22
A robot hand using a paint scraper to remove paint from a wall.

Web Scraping with the Zyte API

web scrapingZyte
2025/01/14
 

Installing CPLEX

optimisation
2024/12/11
 

Installing MOSEK

optimisation
2024/12/11
A concrete water tank in dry scrubland near a stone farmhouse and large trees.

Optimisation with Pyomo

optimisationPython
2024/12/10
A concrete water tank and wind pump in arid scrubland with sheep and quiver trees.

Optimisation with CVXPY

optimisationPython
2024/12/09
A concrete water tank and wind pump surrounded by arid scenery and Quiver Trees typical of the Karoo.

Optimisation with SciPy

optimisationPython
2024/12/08
 

Global versus Sequential Optimisation

optimisation
2024/12/07
A concrete water tank surrounded by arid scenery typical of the Karoo.

Optimisation Reference Problem

optimisation
2024/12/06
A gloved hand holding a paint scraper that is being used to scrape flakey cream coloured paint off a wall.

Scraping and Not Modified Responses

web scrapingPython
2024/12/03
A reception desk at a modern hotel.

NetNut Proxies

proxy
2024/11/12
A reception desk at an old world hotel.

What is a Proxy?

proxy
2024/11/11
A bird with a white body and dark cap against a sky with scattered clouds.

Migrating from GitLab Pages to Vercel

Vercel{blogdown}GitLab
2024/11/10
A composite image including elements of financial charts, flags, Wall Street and the NYSE.

Scraping the NYSE Composite Index

web scrapingtradingR
2024/10/25
A banner image featuring the Alpaca logo and the name of the {alpacar} R package.

Asset Price Data

{alpacar}R
2024/10/24
A banner image featuring the Alpaca logo and the name of the {alpacar} R package.

Listing Alpaca Assets

{alpacar}R
2024/10/21
A banner image featuring the Alpaca logo and the name of the {alpacar} R package.

Alpaca API Authentication

trading{alpacar}R
2024/10/13
An abstract image with charts and symbols with an overall economic or financial theme.

Earnings Calendar

BASHweb scrapingrequeststradingPython
2024/10/12
An image of a computer on a wooden desk. On either side of the computer is a table lamp. The computer screen has an image of two cows.

Caching & Avoiding Duplication

web scrapingrequestsPython
2024/10/10
A picture in a style similar to that of Constable depicting cargo being offloaded from a sailing ship.

Downloading Files with Selenium

web scrapingSeleniumPython
2024/10/05
An abstract image with charts and symbols with an overall economic or financial theme.

Economic Calendar

web scrapingPlaywrighttradingPythonR
2024/10/02
An hourglass in a landscape imitating style of Paul Cézanne.

Your Life in Weeks

{ggplot2}R
2024/08/13
An image of blue sky with clouds.

Bypassing Cloudflare with Cloudscraper

web scrapingCloudflarePython
2024/07/20
An abstract pattern, reminiscent of Paisley.

Unpacking cURL Commands

RPython
2024/07/10
Title image for the Big Book of R.

Updates to the Big Book of R

QuartoR
2024/06/26

Thunderbird displaying an email and its reply grouped into a single thread.

{emayili} Creating Email Threads

{emayili}R
2024/06/22
A teal graphic reading openai-python 1.33.0 is here!

Release: openai-python 1.33.0

LLMPython
2024/06/08
A helicopter lowering a whale into the ocean.

Installing Docker

DockerLinuxUbuntu
2024/06/05

An embedded Google map of the United States with many physician location markers.

Locations from Google Map

web scrapingPython
2024/05/26
 

Desert Island Docker: R Edition

DockerspeakingR
2024/05/23
 

Desert Island Docker: Python Edition

DockerspeakingPython
2024/05/14

A PDF viewer showing the book table of contents and Chapter 1 page for 101 Small Business Ideas for Under $5000.

Extract Chapter Headings from PDF

PDFBASH
2024/04/29
{emayili} Support for Mailtrap

{emayili} Support for Mailtrap

{emayili}R
2024/04/23
A farmer hoeing his field in the style of John Constable.

Backtesting

quantGARCHR
2024/04/21
A fanciful depiction of a Docker daemon in the style of Bernardo Patentino.

Docker-in-Docker with GitHub Actions

DockerGitHub
2024/04/21
A farmer, his sheep and equipment in the style of John Constable.

Asset Allocation

quantGARCHR
2024/04/19
Cut logs floating down a river in the Amazon.

Logging like a Lumberjack

loggingPython
2024/04/18
Cows in a field bordered by a dry stone wall. In the style of Joseph Conrad.

Parameter Constraints & Significance

quantGARCHR
2024/04/16
A painting of a river valley. On the left the countryside it verdant and green. On the right it's dry and brown.

Risk/Reward Tradeoff

quantGARCHR
2024/04/15
An minimal image evocative of a whale.

Docker Image from Scratch

Docker
2024/04/14
A farmer inspecting a cow. Image in style of John Constable.

Model Validation

quantGARCHR
2024/04/14
A landscape in the style of John Constable.

Parameter Significance & Parsimonious Models

quantGARCHR
2024/04/13
Two ladies on a seesaw in a field. In style of John Constable.

Leverage Effect

quantGARCHR
2024/04/12
A house tilted to the side in the middle of a river. Painting in the style of John Constable.

Skewed Returns

quantGARCHR
2024/04/11
A landscape in the style of John Constable.

What is a GARCH Model?

quantGARCHR
2024/04/10
An image of barrels being loaded onto carts in a style similar to that of John Constable.

Rolling Volatility & Returns

quantR
2024/04/09
An image of farm workers loading hay onto the back of a wagon in a style similar to that of John Constable.

Loading Financial Time Series

quantR
2024/04/08
 

PyInstaller, boto3 and configparser

Python
2024/04/03
Intellectuals at work in a Baroque style.

Python Packages from GitHub

PythonGitHubGit
2024/03/10
Read by Frank Collier

Read by Frank Collier

2024/03/08
Traffic in a LEGO landscape.

Host & Port: Where is it?

Traefik
2024/03/02
Traffic in a LEGO landscape.

What is Traefik?

TraefikNGINX
2024/03/01
An image of a whale.

Standalone Next.js Application in Docker

Docker
2024/02/23
A colourful image of people working in an impressionist style.

Testing CSS & Xpath

web scrapingCSS
2024/02/08
A mobster in Art Deco style.

Parsing the DOM

Gatsby
2024/02/07
An elaborate theatre in art deco style.

Gatsby Content from RSS

RSSGatsby
2024/02/06
An elaborate theatre in art deco style.

Gatsby Content from MDX

TypeScriptGatsby
2024/02/02
People socialising in an art deco style.

Dynamic User Pages

Gatsby
2024/02/01
A Roman centurion guarding a cage of snakes.

Python Security Audit

pre-commitGitPython
2024/01/23
 

ChromeDriver in GitLab CI Pipeline

SeleniumChromeDriverCIGitLab
2024/01/22
A medium conducting a seance in art deco style.

Gatsby Content from Medium

Gatsby
2024/01/20
A whale in art deco style.

Gatsby, Tailwind & Docker

DockerTailwindGatsby
2024/01/19
Three columns with a futuristic city background.

Next.js, Tailwind & Docker

DockerTailwind
2024/01/18
An old fashioned clothes mangle in a room with a wooden floor and stone walls.

Web Scraping with Class Name Mangling

web scraping
2024/01/16
 

.NET and MySQL in Docker

MySQLDocker
2024/01/15
An art deco style image of a garden party with an imposing house in the background.

WordPress Headless CMS

Gatsby
2024/01/06
A picture of a barber in Art Deco style, showing some men getting their hair cut and faces shaved.

Humble Head

Gatsby
2024/01/05
A Minecraft character wearing headphones, striding towards the viewer with an erupting volcano in the background.

Minecraft Plugin: Discord for Voice & Text Chat

pluginUbuntuMinecraft
2023/12/31
A Minecraft character wearing glasses. The landscape and clothing of the character are patterned with newspaper.

Minecraft Paper Server

UbuntuMinecraft
2023/12/30
A large library with vaulted ceiling.

Weekly Digest & Annual Review

KerasSSHJuliaFirefox
2023/12/29
A whale leaping out of the ocean in the style of Vincent van Gogh.

Chrome & ChromeDriver in Docker

DockerChromeDriverSelenium
2023/12/19
SSH Tunnel: Dynamic Port Forwarding

SSH Dynamic Port Forwarding with a SOCKS5 Proxy

SSHLinux
2023/12/19
An image of a library.

Weekly Digest

2023/12/15
A tunnel with large yellow earth-moving equipment.

SSH Tunnel: Remote Port Forwarding

SSHLinux
2023/12/13
Planes in an art deco style.

Middleware Redirects on Vercel

VercelGatsby
2023/12/12
A Minecraft scene with a river and trees.

Minecraft Client on Ubuntu

UbuntuMinecraft
2023/12/11
A Minecraft scene with a large character in the foreground.

Minecraft Server on Ubuntu

UbuntuMinecraft
2023/12/10
An image of a library.

Weekly Digest

LLMDockerSelenium
2023/12/08
Moored boats in an art deco style.

Static Redirects on Vercel

VercelGatsby
2023/12/05
A tunnel with large yellow earth-moving equipment.

SSH Tunnel: Local Port Forwarding

SSHLinux
2023/12/05
A surrealistic image of the confluence between two rivers.

Git: Accept All Incoming Changes in a Merge

Git
2023/12/01
An image of a library.

Weekly Digest

SparkKerasVercelR
2023/12/01
Weekly Digest — 2023/11/24

Weekly Digest

R
2023/11/24
Externalise CSS

Externalise CSS

CSSGatsby
2023/11/20
Weekly Digest — 2023/11/17

Weekly Digest

Docker
2023/11/17
Gatsby on Vercel.

Gatsby on Vercel

VercelGatsby
2023/11/15
Dynamic Routing with Gatsby

Dynamic Routing

Gatsby
2023/11/13
Weekly Digest — 2023/11/10

Weekly Digest

2023/11/10
Custom 404 Page

Custom 404 Page

Gatsby
2023/11/09
Gatsby on Netlify

Gatsby on Netlify

Gatsby
2023/11/08
Cookies & Headers from Selenium

Cookies & Headers from Selenium

web scrapingSeleniumcookiesPython
2023/11/07
Adding robots.txt to a Gatsby Site

Adding robots.txt to a Gatsby Site

SEOGatsby
2023/11/06
Weekly Digest — 2023/11/03

Weekly Digest

AWSDockerSpark
2023/11/03
Update Sitemap for canonical pages.

Update Sitemap for Canonical Pages

SEOsitemapGatsby
2023/11/02
Adding Canonical Tags

Add Canonical Links with Gatsby

SEOGatsby
2023/11/01
Gatsby Site Versions

Gatsby Site Versions

Gatsby
2023/10/31
Conditional Content in AsciiDoc

Conditional Content in AsciiDoc

AsciiDocGatsby
2023/10/30
Add Fields to the GraphQL Schema

Add Nodes & Fields to GraphQL Schema

AsciiDocGraphQLGatsby
2023/10/27
Weekly Digest — 2023/10/27

Weekly Digest

AWSDockerCSS
2023/10/27
Gatsby Page Ordering

Gatsby Page Ordering

AsciiDocGraphQLGatsby
2023/10/25
Adding GraphQL Fields to a Gatsby Site

Adding Custom Attributes to Pages in a Gatsby Site

AsciiDocGraphQLGatsby
2023/10/24
Gatsby Redirects

Gatsby Redirects

Gatsby
2023/10/23
Gatsby banner image.

Adding a Sitemap with Gatsby

SEOsitemapGatsby
2023/10/22
An art deco theatre stage with a glowing Gatsby sign.

Gatsby Content from AsciiDoc

AsciiDocGatsby
2023/10/14
A crowded Gatsby-style ballroom beneath tiered chandeliers.

Convert Gatsby from JavaScript to TypeScript

TypeScriptGatsby
2023/10/11
Gatsby banner image.

Gatsby Starter Project

JavaScriptGatsby
2023/10/07
Why Do Sports Odds Change?

Why Do Sports Odds Change?

sports betting
2023/09/30
Undetected ChomeDriver with noVNC.

Undetected ChromeDriver with noVNC

DockerSeleniumChromeDriverweb scrapingnoVNC
2023/09/24
Gatsby running out of heap space.

Gatsby running out of heap space

CIGatsbyGitHub
2023/09/08
An American flag above the words Transparency in Coverage.

Transparency in Coverage: JSON Data

JSONdata: medical
2023/08/27
An American flag above the words Transparency in Coverage.

Unravelling Transparency in Coverage Data

data: medicaljqJSONR
2023/08/26
Transparency in Coverage

What is Transparency in Coverage Data?

data: medical
2023/08/25
Mocking S3 in Python tests

Mocking S3 from Python tests

testingpytestS3Python
2023/08/04
Controlling what Alembic Autogenerates

Controlling what Alembic Autogenerates

Alembic
2023/07/22
 

List of Medical Conditions

web scraping
2023/06/24
Flattening nested schemas in Marshmallow.

Flattening Nested Schemas

MarshmallowSQLAlchemy
2023/06/11
Hosting a GitLab Runner with Docker.

Hosting a GitLab Runner with Docker: Update

GitLab
2023/05/30

The GitLab form for creating a new project runner with tags, options and timeout settings.

GitLab Runner: Creating a Token

GitLab
2023/05/30
A photo-realistic image of a whale dressed to play tennis.

Pushing to Docker Hub from GitHub Actions

DockerGitHub
2023/05/28
Pushing to Docker Hub from GitLab CI

Pushing to Docker Hub from GitLab CI

DockerGitLab
2023/05/28
Eight racing kayaks shown from above on a white background.

Kayak Specifications

kayak
2023/05/25
 

Column Order: Inheritance & Declarative Base

SQLAlchemy
2023/05/18
Cartoon image of a currency exchange.

South Africa Real Effective Exchange Rate

2023/05/17
Using mailmap to tidy Git contributors.

Using mailmap to Tidy Git Contributors

Git
2023/05/01
An art deco image of a kitchen.

Installing Gatsby

UbuntuGatsby
2023/04/06
Developing a Gatsby Site with Docker

Developing a Gatsby Site with Docker

DockerGatsby
2023/04/04
Configuring BASH History

Configuring Bash History on Linux

LinuxBASH
2023/04/01
Chrome DevTools Protocol & Selenium.

Chrome DevTools Protocol & Selenium

web scrapingSeleniumdevtools
2023/03/11
Content-ID and Message-ID

Content and Message IDs

email
2022/12/18
{emayili} Support for ZeptoMail

{emayili} Support for ZeptoMail

{emayili}R
2022/11/27

AWS Workspaces client.

AWS Workspace Client on Ubuntu 22.10

AWSUbuntu
2022/11/02
Stay Below the Radar: Undetected ChromeDriver

Stay Below the Radar

DockerSeleniumChromeDriverweb scraping
2022/10/26
{pagedown} Page Size & Margins

{pagedown} Page Size & Margins

{pagedown}R
2022/10/22
Scaling Density Plots

Scaling Density Plots

{ggplot2}{ggridges}R
2022/10/08
 

Handling Empty Paragraphs from R Markdown

MarkdownHTMLCSSR
2022/09/29

A blue square and a green square.

Vertically Align an Image and Text in a div

HTMLCSS
2022/09/24
Enforcing Style in an R Project

Enforcing Style in an R Project

lintpre-commitGitR
2022/09/20
Enforcing Style in a Python Project

Enforcing Style in a Python Project

lintpre-commitGitPython
2022/09/19

A left-handed spiral.

Squares & Spirals

R
2022/09/18
Calculating the Fire Danger Index (FDI)

Calculating the Fire Danger Index (FDI)

R
2022/09/08
Using Shiny Server in Docker

Using Shiny Server in Docker

ShinyDockerR
2022/09/07
Postboxes & Postal Codes

Postboxes & Postal Codes

{blimey}R
2022/08/13
The GitHub social preview card for the {blimey} package.

Schools in England

{blimey}R
2022/08/11
Linux Packages for R

Linux Packages for R

LinuxR
2022/08/09
Historical Weather Data

Historical Weather Data

RPython
2022/08/07
Persisting Data with Pickle & S3

Persisting Data with Pickle & S3

S3Python
2022/07/28
The GitHub social preview card for the {blimey} package.

Great Britain Railway Network

spatial{blimey}R
2022/07/16
An old stock exchange trading floor from the 1920s.

Interactive Brokers API: Connecting from MATLAB

trading
2022/05/10
An old stock exchange trading floor from the 1920s.

Interactive Brokers Client Portal API Gateway

trading
2022/05/09
Interactive Brokers: Gateway Automation

Interactive Brokers: Gateway Automation

trading{IBrokers}
2022/04/21
The Interactive Brokers logo on a black background.

Interactive Brokers: Gateway Install & Setup

trading
2022/04/20
{emayili} Encrypted Email with Mailfence

{emayili} Encrypted Email with Mailfence

GPG{emayili}R
2022/04/04
Mailfence Setup

Mailfence Setup

encryptionemail
2022/04/03
Pre-Registered GitLab Runner in a Container

Pre-Registered GitLab Runner in a Container

DockerGitLab
2022/03/23
Scheduling Refresh of a Materialised View

Schedule a PostgreSQL Materialised View Refresh

PostgreSQLAWSRDSSQL
2022/03/22
Firing Up Firestore

Firing Up Firestore

Python
2022/03/20
Making sense of drug prices.

Making Sense of Drug Prices

2022/03/09
Updated Gmail Authentication

{emayili} Updated Gmail Authentication

{emayili}R
2022/03/08
Banner for 'Creating Git Commits in CI' post.

Creating Git Commits in CI

CIGitGitLabGitHub
2022/03/04
 

Adding Timestamp Columns

PostgreSQLSQL
2022/02/23
Pushing Docker Images to AWS ECR

Pushing Docker Images to AWS ECR

DockerGitLabECR
2022/02/18
How to Harvest RSS Feeds

How to Harvest RSS Feeds

RSSweb scraping
2022/01/31
Upgrading R

A Recipe for Upgrading R

R
2022/01/25
Message Templates

{emayili} Message Templates

{emayili}R
2022/01/21
Sending Email from Shiny

{emayili} Sending Email from Shiny

Shiny{emayili}R
2022/01/20
HTML Messages with Images

{emayili} HTML Messages with Images

{emayili}R
2022/01/12
 

Building GPXSee

spatial
2022/01/05
Translating Quick Chart Map Files

Translating QCT (Quick Chart) Map Files

spatialPythonDocker
2021/12/30
{emayili} Sending Encrypted Email

{emayili} Sending Encrypted Email

{emayili}R
2021/12/07
{emayili} Understanding Encrypted Email

{emayili} Understanding Encrypted Email

emailencryptionGPG{emayili}
2021/11/26
{filebin} Quick & Easy File Sharing

{filebin} Quick & Easy File Sharing

{filebin}R
2021/11/18
{binance} Spot Trading

{binance} P2P Trades

{binance}R
2021/11/10
Shared Memory & Docker

Shared Memory in Docker with the shm-size Flag

SeleniumLinuxDocker
2021/11/09
{binance} Spot Trading

{binance} Spot Trading: Liquidity

{binance}R
2021/11/08
Accessing Virtual Memory from a Docker Container

Accessing Virtual Memory from a Docker Container

Docker
2021/11/06
{binance} Spot Trading

{binance} Spot Trading: Limit Orders

{binance}R
2021/11/05
{binance} Spot Trading

{binance} Spot Trading: Market Orders

{binance}R
2021/11/01
{binance} Dealing with Dust

{binance} Dealing with Dust

{binance}R
2021/10/27
{binance} Tracking Total Account Balance

{binance} Tracking Total Account Balance

{binance}R
2021/10/26
HCRIS Field Labels

HCRIS Field Labels

{pdftools}R
2021/10/19
{emayili} Message Threads

{emayili} Message Threads

{emayili}R
2021/10/18
{emayili} Support for Gmail, SendGrid & Mailgun

{emayili} Support for Gmail, SendGrid & Mailgun

{emayili}R
2021/10/15
Fathoming Email Headers

Fathoming Email Headers

email
2021/10/11
{emayili} Message Precedence

{emayili} Message Precedence

{emayili}R
2021/10/06
{emayili} Message Integrity

{emayili} Message Integrity

{emayili}R
2021/10/05
Working with Fairly Wide Data

Working with Fairly Wide Data

SQLR
2021/10/04
Medusa: A Multi-Headed Tor Proxy

Medusa: A Multi-Headed Tor Proxy

web scrapingproxyTor
2021/10/01
{emayili} Right-to-Left

{emayili} Right-to-Left

Markdown{emayili}R
2021/09/24
{emayili} Styling Figures

{emayili} Styling Figures

Markdown{emayili}R
2021/09/23
{emayili} Managing CSS

{emayili} Managing CSS

Markdown{emayili}R
2021/09/22
{emayili} R Markdown Parameters

{emayili} R Markdown Parameters

Markdown{emayili}R
2021/09/20
{emayili} Rendering R Markdown

{emayili} Rendering R Markdown

Markdown{emayili}R
2021/09/17
{emayili} Rendering Plain Markdown

{emayili} Rendering Plain Markdown

Markdown{emayili}R
2021/09/10
{clockify} — Time Tracking from R

{clockify} Time Tracking from R

{clockify}R
2021/09/09
Setting up a Tiny HTTP Proxy

Tinyproxy Configuration: Set Up a Tiny HTTP Proxy

AWSproxy
2021/09/08
Pre-Commit Hook for Processing

Pre-Commit Hook for Processing README.Rmd

RGit
2021/09/05
{emayili} Interpolating Message Content

{emayili} Interpolating Message Content

{emayili}R
2021/09/03
Websockify with Token Target Selection

Websockify with Token Target Selection

NGINXnoVNCWebsockify
2021/08/22
{emayili}: Rudimentary Email Address Validation

{emayili} Rudimentary Email Address Validation

{emayili}R
2021/08/21
Image adapted from the cover of 'Old Hat New Hat' by Dr Seuss.

Old ’Hood, New ’Hood

spatial{geosphere}{ggmap}R
2021/08/11
Websockify & noVNC: Adding SSL

Websockify & noVNC: Adding SSL

NGINXnoVNCWebsockify
2021/08/08
Websockify & noVNC behind an NGINX Proxy

Websockify & noVNC behind an NGINX Proxy

NGINXnoVNCWebsockify
2021/08/07
Creating an AMI using the AWS CLI

Creating an AMI using the AWS CLI

AWS
2021/07/31
TomTom Traffic banner.

TomTom Traffic

{tomtom}R
2021/07/27
A highway stretching into the distance.

TomTom Routing

spatial{tomtom}R
2021/07/26

GitLab banner.

Fixing Truncated Logs on Gitlab CI/CD

CIGitLab
2021/07/24

A highway with mountains on the horizon.

Mobility & Unrest in South Africa

{saffer}{mobility}R
2021/07/24

ECS

SSH Tunnel from Docker

SSHDocker
2021/06/25
A banner image featuring the Shiny logo and the name of the {shiny} R package.

Shiny on ECS

ShinyECSR
2021/06/24

Tweet poll about amount of swap space to use on a Linux system.

Adding Swap Space on Ubuntu

Linux
2021/06/10
 

Scrapy with a Rotating Tor Proxy

proxyTorScrapyDockerPython
2021/06/09

ECS task size settings.

RAM & CPU Requirements for a Selenium Crawler

AWSSeleniumweb scrapingECS
2021/06/04

A Shiny app with static views of the Penguins data.

Shiny Inception: JavaScript in Rendered Markdown

ShinyR
2021/06/03

Airflow

Building an Airflow Environment in Docker

DockerUbuntu
2021/05/31

An LXDE desktop accessible via HTTP.

Desktop in Docker

DockerUbuntu
2021/05/30
Using {pagedown} in Docker

Using {pagedown} in Docker

Docker{pagedown}R
2021/05/28

Selecting a target group.

AWS EC2: Setting up a Load Balancer

AWSEC2
2021/05/09
A banner image for AWS/EC2.

AWS EC2: Creating a Target Group

AWSEC2
2021/05/08
A banner image for AWS/ECS.

AWS Containers #8: Setting up a Service

AWSECS
2021/05/06
A banner image for AWS/EC2.

AWS EC2: Security Groups

AWSEC2
2021/05/02
A banner image for AWS/ECS.

AWS Containers #4: Dependencies

AWSECS
2021/04/28
A banner image for AWS/ECS.

AWS Containers #5: Health Checks

AWSECS
2021/04/28
A banner image fof AWS/ECR.

AWS Containers #3: Image on ECR

DockerAWSECR
2021/04/27
A banner image for AWS/ECS.

AWS Containers #2: Defining an ECS Task

DockerAWSECS
2021/04/26
A banner image for AWS/ECS.

AWS Containers #1: Creating an ECS Cluster

AWSECS
2021/04/25
A banner image featuring the Docker logo.

Selenium Crawler #3: Docker Compose

SeleniumDockerPython
2021/04/19
A banner image featuring the Docker logo.

Selenium Crawler #2: Docker Bridge Network

SeleniumDockerPython
2021/04/18
A banner image featuring the Docker logo.

Selenium Crawler #1: Docker Host Network

SeleniumDockerPython
2021/04/17

Taxonomic ranks.

{hagr} Linnaean Classification

{hagr}R
2021/04/16

A 100 Watt light bulb.

{hagr} Database of Animal Ageing and Longevity

{hagr}R
2021/04/12
Happy Easter banner.

The Easter Bunny is Cashing In

{trundler}R
2021/04/03

Mobility for workplaces.

Making the Most of Mobility

R
2021/04/02

Banner for the {core} package.

An Environment for Reliably Rendering Figures in R

DockerR
2021/03/23

Docker banner.

Flexible Environment Variables for a Docker Image

DockerCIGitLab
2021/03/22
The Docker logo on a white background.

Install GitLab Runner with Docker

DockerCIGitLab
2021/03/21
Banner for the {emayili} package.

{emayili} UTF-8 Filenames & Setting Sender

{emayili}R
2021/03/08

PGLoader banner.

Resurrecting MySQL into PostgreSQL with PGLoader

MySQLPostgreSQLDocker
2021/03/02
The {blogdown} hex sticker and wordmark on a white background.

{blogdown}: Optimise PNG Image Size

{blogdown}R
2021/02/21
Banner for the {emayili} package.

{emayili} Sending Birthday Messages

{emayili}R
2021/02/18
The {blogdown} hex sticker and wordmark on a white background.

Setting up postref Shortcode for Remote Blog

Hugo{blogdown}R
2021/02/10

Selenium banner.

Launching Selenium with JavaScript Disabled

Seleniumweb scrapingPython
2021/02/03

Components of the South African fuel price as a stacked area chart.

Levies, Tax and the Fuel Price in South Africa

{saffer}R
2021/02/01

The network bandwidth that you get from Rain is not much more than a trickle.

This is not Rain: It’s a Trickle

Seleniumweb scrapingR
2021/01/30

Selenium banner.

Persistent Selenium Sessions

SeleniumPython
2021/01/28
A banner image for the {saffer} R package with a hex logo featuring the South African flag.

Cyril’s Speeches

{saffer}R
2021/01/14
A banner image for the {saffer} R package with a hex logo featuring the South African flag.

Topographic Maps for South Africa

spatialDocker{saffer}R
2021/01/12
A banner image for the {saffer} R package with a hex logo featuring the South African flag.

Price of Fuel in South Africa

{saffer}R
2021/01/10

SQLAlchemy logo

SQLAlchemy: Efficient Counting

SQLAlchemySQL
2021/01/09

Banner for the {trundler} package.

Retail Pricing: Latex Gloves

{trundler}R
2021/01/06
Garmin logo.

Running History: Garmin Connect

runningR
2021/01/05

Banner for the {trundler} package.

Retail Pricing: Nitrile Gloves

{trundler}R
2021/01/04
Strava logo.

Running History: Strava

runningR
2021/01/02
The GitLab logo on a white background.

GitLab CI: Services

GitLab
2020/12/30
 

Rendering an R Markdown Presentation to GitLab Pages

RGitLab
2020/09/23
 

Scrapy Ban Policies with Rotating Proxies

Scrapy
2020/09/17
 

Uploading CSV to MySQL

MySQL
2020/09/01

DBeaver dialog for connecting to a PostgreSQL database.

Configuring a Development Database

Docker
2020/08/30
Resizing a Volume on an EC2 Linux Instance.

Resizing a Volume on an EC2 Linux Instance

AWS
2020/08/04
A banner image featuring the NGINX logo and the name of the NGINX package.

Shiny App in Docker with HTTP Authentication

DockerShinyNGINXR
2020/06/29

Romantic red roses for sale in Gauteng only.

Retail Data: R Package

{trundler}R
2020/03/15

Swagger interface for the Retail Pricing Data API.

Retail Data: Scraping & API

web scrapingPython
2020/03/15

Logo for @racently.

R Package for @racently

runningR
2019/12/06

Banner for the Durban EDGE DataQuest.

Durban EDGE DataQuest

R
2019/11/13
Logo for @racently.

An API for @racently

runningR
2019/11/12

Banner image for 'Scraping Machinery Parts'.

Scraping Machinery Parts

web scrapingR
2019/11/11

R banner.

Installing Prophet on CentOS

LinuxR
2019/11/04

Optimisation banner.

Private Security and the Pareto Principle

Data ScienceR
2019/10/16
 

Tweaking Linux for Pernickety Projectors

Linuxspeaking
2019/10/12
 

MySQL Backups

MySQL
2019/09/17

Terminal window showing connection to Docker container running R using packages installed on the image.

R, Docker and Checkpoint: A Route to Reproducibility

DockerR
2019/08/28

Map showing optimal routes from geographic centre of the USA to all counties.

All Roads Lead to Rome

OSRMR
2019/07/28
 

Using Shared Memory with OSRM

OSRMLinux
2019/07/26

Cover image of the Joy Division 'Unknown Pleasures' album recreated in R using the {ggridges} package.

Recreating ‘Unknown Pleasures’ graphic

R
2019/07/15

Distribution of running times in the 2019 Comrades Marathon broken down by major landmarks on course.

Comrades Marathon (2019) Splits

runningR
2019/07/01

Medal distribution at the 2019 Comrades Marathon broken down by gender and age category.

Medal Breakdown at Comrades Marathon (2019)

runningR
2019/06/30

Delay at the start of the Comrades Marathon broken down by batch.

Comrades Marathon (2019) Start Delay

runningR
2019/06/15

Interface of the Comrades Marathon pacing app.

A Shiny Comrades Marathon Pacing App

ShinyrunningR
2019/06/04
Banner for the {emayili} package.

{emayili} Sending Email from R

{emayili}R
2019/05/27
 

Setting up an R Admin Group

R
2019/04/11

A sliding puzzles with tiles numbered from 1 to 8.

Sliding Puzzle Solvable?

Python
2019/04/10

Relationship between Rserve, the SSE plugin and Qlik Sense on Windows.

Integrating Qlik Sense and R

DockerR
2019/03/26

The tomb of Jim Morrison in the Père Lachaise Cemetery.

satRday (Paris) 2019

conference
2019/02/25
 

Docker Images for R: r-base versus r-apt

DockerR
2019/01/21
 

RServe: Getting Started

R
2019/01/21
 

JSON Payload for POST Request

R
2019/01/10
Logos for Citrix and R.

Where does .Renviron live on Citrix?

R
2019/01/08
Banner for Survey Raking post.

Survey Raking: An Illustration

R
2018/12/26
 

Citrix Receiver on Ubuntu

LinuxCitrix
2018/12/14
Banner for Scraping the Turkey Accordion post.

Scraping the Turkey Accordion

web scrapingR
2018/12/12
 

RStudio & Shiny Servers with NGINX & SSL

ShinyR
2018/11/14
 

Installing RStudio & Shiny Servers

ShinyR
2018/11/13

Example of data from the Registry of Open Data on AWS.

Accessing Open Data from AWS

AWS
2018/11/04
 

Embedding Dependencies into a HTML File

speaking
2018/10/31
 

DNS on Ubuntu

Ubuntu
2018/10/25
 

@pyconza (2018): Data Science and Bayes with Python

conferencePython
2018/10/15
 

Docker Images for Spark

DockerSpark
2018/09/28
A banner image featuring the MySQL logo.

MySQL Server Replication using Binary Logs

MySQL
2018/09/17

The OpenVPN logo.

DIY VPN with Docker

DockerVPN
2018/09/11

Creating an IAM policy by cloning the IAMFullAccess policy.

Refining an AWS IAM Policy for Flintrock

SparkAWS
2018/09/08
 

Diagnosing RStudio Startup Issues

R
2018/09/07
Being the Chair: Notes on Running a Conference Session.

Chairing a Conference Session

speakingconference
2018/08/09

Julia and Stan logos.

Setup for using Stan with Julia

Julia
2018/07/25
 

Updating R on Ubuntu

R
2018/07/09
A few pictures from Budapest.

eRum (2018) Top Twenty

conferenceR
2018/05/18

Optimal route between various locations around Durban.

Travelling Salesman with ggmap

R
2018/05/10
Graphic from the Depeche Mode album 'Get the Balance Right'.

Classification: Get the Balance Right

R
2018/04/21
 

Workshop: Web Scraping with R

2018/04/12
 

Tips for Lightning Talks

speakingR
2018/04/06
 

Restoring a Django Backup

Django
2018/02/23

The DataGrip logo.

Installing DataGrip on Ubuntu

LinuxSQL
2018/02/16
 

SQL Server from Ubuntu

LinuxSQL
2018/02/05

Select the Compute option.

Linux VM on Azure

AzureLinux
2018/02/05
 

Installing rJava

LinuxDockerR
2018/02/05
 

Ethereum: DIY Tools for Smart Contracts

Ethereum
2018/01/19

Time series plot of Ethereum transactions.

Ethereum: Running a Node

Ethereum
2018/01/19

Status page for NTP server at za.pool.ntp.org.

NTP: Synchronise Your Watches

2018/01/11
Charts showing number of Ethereum transactions and unique addresses.

An Ethereum Package for R

Ethereum
2018/01/07
 

Moving a Running Process to screen

Linux
2017/12/30

Creating an AMI: Setting name and description.

Creating an Amazon Machine Image

AWS
2017/12/04

Running across 32 cores on a r4.8xlarge instance.

Using Large Maps with OSRM

OSRM
2017/11/27
 

EC2 Missing Disk Space

AWS
2017/11/23
 

Variable Names: Camel Case to Underscore Delimited

R
2017/11/20

Image from satRday 2017 in Cape Town.

Analysis of Feedback from satRday [Cape Town] 2017

satRdayConferenceR
2017/11/15

Number of tweets versus day showing clear diurnal pattern.

Durban Twitter Analysis

R
2017/11/10
 

Running OSRM with Docker

DockerOSRM
2017/10/07

Choosing which NVIDIA driver to download.

Installing NVIDIA Graphics Driver on Ubuntu

LinuxGPU
2017/10/07
 

Exporting HTML Presentations to PDF

speaking
2017/10/05

The Docker logo.

Quick WordPress Install with Docker

WordPressMySQLNGINXDockerLinux
2017/09/22

Comic about the Out of Memory (OOM) killer.

Diagnosing Killed Jobs on EC2

LinuxAWS
2017/09/21
Redundant hostnames dialog in Google Analytics.

Removing Redundant Hostnames with NGINX

NGINX
2017/09/15

The AWS S3 management console.

Creating a S3 Bucket

AWS
2017/09/14
 

Installing Docker on Ubuntu

DockerLinux
2017/09/14

The {plumber} logo.

Hosting a Plumber API on AWS

AWSPlumberR
2017/09/14

Example of prices of various spot instance prices.

Creating an AWS Spot Instance

AWS
2017/09/13

Exporting data from OpenStreetMap.

Building a Local OSRM Instance

OSRMR
2017/09/11
 

Global Variables in R Packages

R
2017/09/07
 

Driving AWS from the Command Line

AWS
2017/08/31

Google Maps showing recommended route from A to B.

Route Asymmetry in Google Maps

R
2017/08/23
 

Retrieve Kaggle Data from the Command Line

AWS
2017/08/21
 

Setting Up Time Zones in BASH

BASH
2017/08/20
 

Setting Up Time Zones in MySQL

MySQLDjango
2017/08/20

Adding a new volume in the AWS console.

Adding a Volume to an Ubuntu EC2 Instance

AWS
2017/08/10

The Vinagre login dialog.

Remote Desktop on an Ubuntu EC2 Instance

AWS
2017/08/08

An R banner.

A Timeline History of R

R
2017/08/05

The AWS logo.

Adding Users to an EC2 Ubuntu Instance

AWSLinuxSSH
2017/07/24

The Docker logo.

Docker: Persisting User Data

Docker
2017/07/20

The AWS EC2 logo.

Deploying Jupyter on AWS using Docker

JupyterDockerAWS
2017/07/18

Docker banner.

RStudio Environment on DigitalOcean with Docker

DockerR
2017/07/11
 

Installing Hadoop on Ubuntu

Linux
2017/07/04

The Spark status page.

Installing Spark on Ubuntu

LinuxSpark
2017/07/04

A Jupyter notebook using the `findspark` and `pyspark` packages.

Accessing PySpark from a Jupyter Notebook

JupyterSpark
2017/07/04
 

Increasing MySQL Packet Maximum Size

MySQL
2017/07/01
Logo of ExpressVPN.

Setting up ExpressVPN on Ubuntu

Linux
2017/06/23
A sample Jupyter notebook.

Setting up Jupyter with Python 3 on Ubuntu

JupyterLinux
2017/06/23

The Swagger interface for a simple Plumber API.

Deploying a Minimal Plumber API on DigitalOcean

R
2017/06/21
 

RSelenium and Java Heap Space

web scrapingSeleniumR
2017/06/09

Time series of adjusted closing price for a selection of stocks.

Clustering Time Series Data

Machine Learning
2017/04/25
Logo for the Bulgaria Web Summit (2017).

Bulgaria Web Summit

Conference
2017/04/16

Distribution of predicted marathon finish times based on initial beliefs without any information on a specific runner.

Bayesian Marathon Predictions

runningBayesianR
2017/02/28

Amazon book recommendations showing running, garlic gardening and data science titles.

Amazon is Getting Inside my Head

2017/02/26

Results from the Quick, Draw! neural network.

Google Quick, Draw!

2016/11/17
 

Simple School Maths Problem

2016/11/15

Banner image for satRday (2016) conference in Cape Town.

satRday Cape Town: Call for Submissions

ConferenceR
2016/10/26

Twitter banner.

fast-neural-style: Real-Time Style Transfer

Machine Learning
2016/10/07

A Cullen-Frey plot relating kurtosis to square of skewness.

Fitting a Statistical Distribution to Sampled Data

R
2016/10/05

MongoDB logo.

Python: First Steps with MongoDB

MongoDBPython
2016/09/28

Choosing connection speed to emulate in Chrome DevTools.

Chrome Developer Tools: Throttling Connection

web scraping
2016/09/20

Network tab in Chrome Developer Tools while a query is being processed.

Chrome Developer Tools: View POST Data

web scraping
2016/09/19

A simple graph with a number of nodes and edges.

Deleting All Nodes and Relationships

Neo4j
2016/09/15
The Neo4j logo.

Remote Access to Neo4j on Windows

Neo4j
2016/09/13
The Neo4j logo.

Installing Neo4j on Ubuntu

Neo4jLinux
2016/09/06
Banner image for post on Association Rules.

PLOS Subject Keywords: Association Rules

Association RulesR
2016/09/01

Default profile image.

ubeR: A Package for the Uber API

R
2016/08/31

Article title and abstract from PLOS ONE.

PLOS Subject Keywords: Gathering Data

Association RulesCollaborative FilteringR
2016/08/24
Lead runners in the ladies 800 metre race at the Rio Olympic Games.

Sportsbook Betting (Part 3): Evolving Odds

gamblingR
2016/08/23

Garmin ANT USB Dongle and the Linux penguin.

Garmin ANT on Ubuntu

Linux
2016/08/22
 

Anthony Goldbloom: The jobs we’ll lose to machines

Machine LearningTED Talk
2016/08/22

Simulation of evolution of gambling capital for 100 gamblers betting on even numbers at roulette.

Sportsbook Betting (Part 2): Bookmakers’ Odds

gamblingR
2016/08/10

Animated pyramid plot of deaths versus age broken down by gender for 1994 to 2014.

Animated Mortality

R
2016/08/09
 

feedeR: Reading RSS and Atom Feeds from R

R
2016/08/08
 

Web Scraping and “invalid multibyte string”

web scrapingR
2016/08/02

Odds for the tennis match between Madison Keys and Venus Williams.

Sportsbook Betting (Part 1): Odds

gamblingR
2016/08/01
 

Arthur Benjamin: Teach statistics before calculus!

TED Talkteaching
2016/07/29

Proportion living versus age, broken down by gender.

Building a Life Table

R
2016/07/28

Convergence of an estimate for pi calculated using a simulation of Buffon's Needle.

Calculating Pi using Buffon’s Needle

R
2016/07/26
 

Conrad Wolfram: Teaching kids real math with computers

TED Talkteaching
2016/07/25

Heat map of deaths versus age and year.

Mortality by Year and Age

R
2016/07/22

Female versus male life expectancy at birth broken down by country. Figure from Wikipedia.

Life Expectancy by Country

R
2016/07/20

Density plot of deaths per year versus age broken down by gender.

Mortality Rate by Age

R
2016/07/19

Boxplot of average age at death over time, broken down by gender.

Escalating Life Expectancy

R
2016/07/18

Histogram of births per day versus month of year.

Birth Month by Gender

R
2016/07/16

Bar chart of total birth count per month versus month.

Most Probable Birth Month

R
2016/07/15
 

Streaming from zip to bz2

Linux
2016/07/08

Distribution of birth month for major league baseball players.

Major League Baseball Birth Months

R
2016/07/05

View of Cape Town and satRday logo.

satRday in Cape Town

R
2016/05/26

View of Cape Town and satRday logo.

R Saturday [satRday] in Cape Town

R
2016/05/12
 

The Next Rembrandt

Machine Learning
2016/04/06

Histogram of age distributions for two segments of the South African population, those without schooling and those who have completed Grade 12.

International Open Data Day

R
2016/03/05

Map showing lightning flash density.

R, HDF5 Data and Lightning

R
2016/02/23
 

Ira Glass on the Creative Process

2016/02/12
 

Automating R scripts under Windows

R
2016/02/11
 

flipsideR: Support for ASX Option Chain Data

R
2016/02/08

Scores of best performers in the 'Santa’s Stolen Sleigh' Kaggle competition.

Kaggle: Santa’s Stolen Sleigh

R
2016/01/22

Proportion of congress members who are lawyers over time.

Lawyers and Politics

2016/01/20
 

Casting a Wide (and Sparse) Matrix in R

R
2016/01/19

Kaggle leaderboard for the 'Walmart Trip Type Classification' competition.

Kaggle: Walmart Trip Type Classification

R
2016/01/15

Installation dialog for MongoDB.

MongoDB: Installing on Windows 7

MongoDB
2016/01/13

Cover of 'Mastering Python Scientific Computing'.

Mastering Python Scientific Computing

book reviewPython
2016/01/11

Cover of 'Learning Shiny'.

Review: Learning Shiny

ShinyR
2016/01/05

Checksum error probability versus payload length.

Using Checksum to Guess Message Length: Not a Good Idea!

R
2015/12/22

Line plot of logarithmic loss versus predicted probability for a single positive observation.

Making Sense of Logarithmic Loss

R
2015/12/14

XGBoost logo.

Installing XGBoost on Ubuntu

RPython
2015/12/09

Proportion of salary survey respondents versus geographical region.

2015 Data Science Salary Survey

R
2015/12/04

Histogram of proportional usage of names for males and females.

Evolution of First Names: Unisex Names and Nicknames

2015/11/23

Line plot showing the number of times various names were used between 1880 and the present day. For each name the count for males and females is presented.

Evolution of First Names: Fashionable and Popular Names

2015/11/16

A simple graph constructed from an adjacency matrix.

Graph from Sparse Adjacency Matrix

R
2015/11/12

Ultrasound image of Elizabeth in utero.

First Names Evolution: Changes over Last Century

2015/11/09
 

LIBOR and Bond Yields

R
2015/11/06
 

Guy Kawasaki on Personal Branding

2015/11/03
Working with Images in Julia.

Day 38: Imaging

Julia
2015/10/30
Using Julia to work with Fourier Transforms.

Day 37: Fourier Techniques

Julia
2015/10/26
Using Markdown to format documents in Julia.

Day 36: Markdown

Julia
2015/10/19

Cover of 'Beautiful Data'.

Beautiful Data

book reviewPythonR
2015/10/15
Creating Maps using Julia.

Day 35: Mapping

Julia
2015/10/15
Networking with Julia.

Day 34: Networking

Julia
2015/10/13

The Light Table plugin manager.

Installing LightTable and Juno on Ubuntu

Julia
2015/10/12
Using Evolutionary Algorithms with Julia.

Day 33: Evolutionary Algorithms

Julia
2015/10/12
Building Classification models with Julia.

Day 32: Classification

Julia
2015/10/09
How to build and interpret a Regression model in Julia.

Day 31: Regression

Julia
2015/10/08
Clustering data using Julia.

Day 30: Clustering

Julia
2015/10/07

Cover of 'Data Mining with Rattle and R'.

Data Mining with Rattle and R

Machine Learningbook reviewR
2015/10/07
Using various Distance Measures in Julia.

Day 29: Distances

Julia
2015/10/06
Using Hypothesis Tests with Julia.

Day 28: Hypothesis Tests

Julia
2015/10/05
Working with distributions in Julia.

Day 27: Distributions

Julia
2015/10/02
Doing basic Statistics with Julia.

Day 26: Statistics

Julia
2015/10/01
Mixing Julia with other Programming Languages.

Day 25: Interfacing with Other Languages

JuliaRPython
2015/09/30
Working with Graphs (nodes and edges) in Julia.

Day 24: Graphs

Julia
2015/09/29
Using built-in Data Structures in Julia.

Day 23: Data Structures

Julia
2015/09/28
Optimisation using Julia.

Day 22: Optimisation

Julia
2015/09/25
Solving Differential Equations using Julia.

Day 21: Differential Equations

Julia
2015/09/24
Doing Calculus with Julia.

Day 20: Calculus

Julia
2015/09/23
Using Units of Measurement with Julia.

Day 19: Units of Measurement

Julia
2015/09/22
Plotting with Julia.

Day 18: Plotting

Julia
2015/09/21
 

PhysicalConstants.jl: Julia Package of Physical Constants

Julia
2015/09/21
Accessing R Datasets from Julia.

Day 17: Datasets from R

JuliaR
2015/09/18
Using Databases with Julia.

Day 16: Databases

Julia
2015/09/17
 

Setting up ODBC for SQLite on Ubuntu

Linux
2015/09/17
Doing Time Series analyses with Julia.

Day 15: Time Series

Julia
2015/09/16
Using DataFrames and DataArrays with Julia.

Day 14: DataFrames & DataArrays

Julia
2015/09/15
 

urlshorteneR: A package for shortening URLs

R
2015/09/14
Using Packages to extend the functionality of Julia.

Day 13: Packages

Julia
2015/09/14
Doing Parallel Processing with Julia.

Day 12: Parallel Processing

Julia
2015/09/11
Doing Metaprogramming in Julia.

Day 11: Metaprogramming

Julia
2015/09/10
 

A ggplot2 oddity

R
2015/09/10
Code encapsulation and extension with modules in Julia.

Day 10: Modules

Julia
2015/09/09
Reading and Writing from the console and files with Julia.

Day 9: Input/Output

Julia
2015/09/08
 

Day 8: Iteration, Conditionals and Exceptions

Julia
2015/09/07
 

Day 7: Functional Programming

Julia
2015/09/06

Cover of 'Learn Julia'.

Day 6: Composite Types

Julia
2015/09/05
 

Day 5: Collections

Julia
2015/09/04
Benchmarks of various Programming Languages.

Day 4: Functions

Julia
2015/09/03

xkcd comic about the relationship between sexual arousal and consecutive vowels.

Day 3: Variables and Data Types

Julia
2015/09/02

A Julia session in the Juno IDE.

Day 2: Development Environments

Julia
2015/09/01

Installing Julia on Ubuntu.

Day 1: Installation and Orientation

Julia
2015/08/31

A Shiny application for exploring Bayesian updates.

Shiny Bayesian Updates

BayesianShinyR
2015/07/24

Animation of lightning strikes detected by WWLLN on 4 July 2015.

Lightning on your Twitter Feed

2015/07/13

A word cloud constructed from 300 terms relating to ICML (2015).

Constructing a Word Cloud for ICML 2015

Conference
2015/07/10

Animation demonstrating the execution of a parallel job using Dask.

ICML 2015 (Lille, France): Day 5 (Workshops)

Conference
2015/07/10
 

ICML 2015 (Lille, France): Day 4

Conference
2015/07/10

Images generated by the DRAW neural network.

ICML 2015 (Lille, France): Day 3

Conference
2015/07/08
 

ICML 2015 (Lille, France): Day 2

Conference
2015/07/08

A simple black and white picture of a dog chasing a cat up a tree.

ICML 2015 (Lille, France): Day 1 (Tutorials)

Conference
2015/07/07
Cover of 'Machine Learning with R Cookbook'.

Machine Learning with R Cookbook

Machine Learningbook reviewR
2015/07/03

A volcanic plume containing a lightning discharge.

Flashes from the Ashes: Volcanic Lightning

2015/07/03

An Excel spreadsheet. A region of data and another region with relative links to the original data.

Excel: Copying with Relative Links

Excel
2015/06/26

Bar plots showing how number of movies released by Disney per year has declined from 2006 to 2015, while operating profits have increased.

Disney: Quality over Quantity

2015/06/15
 

R Recipe: RStudio and UNC Paths

R
2015/06/04

AWS Management Console.

Hosting Shiny on Amazon EC2

AWSShinyR
2015/05/30

A poster along the Comrades Marathon route.

Comrades Marathon Medal Predictions

runningShinyR
2015/05/28

Imperfect alignment of axes.

R Recipe: Aligning Axes in ggplot2

R
2015/05/27
 

R Recipe: Reordering Columns in a Flexible Way

R
2015/05/16

Graph showing connections between successive generations in synthetic data.

Recent Common Ancestors: Simple Model

R
2015/05/15

A Chord Diagram with random data.

R Recipe: Making a Chord Diagram

2015/05/09

Scatter plot of time run versus distance covered on a linear scale.

Comrades Marathon Finish Predictions

runningR
2015/04/23

Article indicating that 14 runners were disqualified from the Comrades Marathon.

Comrades Runners Disqualified: I’m Not Convinced

running
2015/04/16
 

Encyclopaedia: Meteorites in Antarctica

2015/04/13

Example riverplot showing constant edge colour.

A Sankey Plot with Uniform Coloured Edges

R
2015/04/07
 

Encyclopaedia: Discovery Expedition

2015/04/06

Simulated probability of picking balls out of an urn.

Bags, Balls and the Hypergeometric Distribution

R
2015/04/03

Pacing chart for a 10 hour finish at the Comrades Marathon.

Comrades Marathon Pacing Chart: Up Run

Excelrunning
2015/04/01

Monthly values of ZAR/USD exchange rate with month-to-month changes.

The Price of Fuel: How Bad Could It Get?

R
2015/04/01
 

Encyclopaedia: Geospace

2015/03/30

Orcadas Base on Laurie Island. Image courtesy of https://www.culturademontania.com.ar/.

Encyclopaedia: Scottish National Antarctic Expedition

2015/03/23

SANAE-IV Antarctic base.

Encyclopaedia: SANAE IV

2015/03/16

CYGWIN window showing results from running the file command on a TSV file.

Dealing with a Byte Order Mark (BOM)

R
2015/03/11

Cover of 'Graph Databases'.

Graph Databases

Neo4jbook review
2015/02/09

Cover of 'R for Business Analytics'.

R for Business Analytics

book reviewR
2015/01/28

Open Interest versus Strike Price for Call and Put options on a selection of dates.

Downloading Options Data in R: An Update

tradingoptionsR
2015/01/14

Evidence of physical processes which produce intricate branching structures.

Simulating Intricate Branching Patterns with DLA

R
2014/12/16

Life expectancy versus year for a selection of countries in xkcd style.

Creating More Effective Graphs

R
2014/11/04

Survey conducted by Standard Bank showing biased scoring scheme.

Standard Bank: Striving for Mediocrity

2014/10/07

An example river plot.

Plotting Flows with {riverplot}

R
2014/08/14

Chart showing change over a week in Commitment of Traders for various currencies.

Commitments of Traders: Moves in the Last Week

R
2014/08/09
 

Whistlers and Volcanic Lightning

2014/07/30

Distribution of runners' ages in the Comrades Marathon for 1980s, 1990s, 2000s and 2010s.

Comrades Marathon: A Race for Geriatrics?

runningR
2014/07/22

Old directory structure for MetaTrader 4 on Windows.

Where to Put EAs and Indicators in New MT4 Builds

2014/07/20
 

Comrades Marathon Negative Splits: Cheat Strikes Again

running
2014/07/16

A Dad and two sons finishing the 2014 Comrades Marathon together.

Twins, Tripods and Phantoms at the Comrades Marathon

runningR
2014/06/12
 

Concatenating a list of data frames

R
2014/06/06

Pacing chart summary.

Comrades Marathon Pacing Chart: Down Run

Excelrunning
2014/05/28

List of legacy Commitment of Traders reports available.

What Can We Learn from the Commitments of Traders Report?

2014/05/21

Histogram of finish times for novice runners in the Comrades Marathon, showing effects of strict and extended cutoffs.

Race Statistics for Comrades Novices: Corrigendum

runningR
2014/05/17

Histogram of finish times for novice runners in the Comrades Marathon.

Race Statistics for Comrades Marathon Novice Runners

runningR
2014/05/16

Distribution of NEOs in the solar-ecliptic plane.

Hazardous & Benign Objects: Solar-Ecliptic Orbits

R
2014/05/12

Tables of splits for various runners, showing runners where splits for Camperdown and Polly Shortts are both missing.

Comrades Marathon Negative Splits: The Plot Thickens

runningR
2014/05/10

Diagram showing relationship between various orbital parameters.

Hazardous & Benign Objects: Kepler’s Equation

R
2014/05/08

Density plot of split ratio.

Comrades Marathon: Negative Splits and Cheating

runningR
2014/05/06

Diagram showing various orbital parameters.

Hazardous & Benign Objects: Getting the Data

R
2014/04/28

Relative proportion of long and short trades.

R Interface to Myfxbook

R
2014/04/17

Map showing earthquake epicentre locations, coded according to whether the location is on land or under ocean.

Earthquakes: Land / Ocean Distribution

R
2014/04/13

Image of the Mount Tambora caldera.

Largest Volcanoes & Other Statistics

R
2014/04/11

Map with earthquake locations showing both depth and magnitude.

Earthquakes: Magnitude / Depth Chart

R
2014/04/07

Histograms of returns on S&P 500 and FTSE 100.

Daylight Saving Effect on Financial Indices

R
2014/04/01

Noisy simulated time series data smoothed using L1 and L2 filters and various regularisation strengths.

Filtering Data with L1 Regularisation

regularisationR
2014/03/27

Noisy simulated time series data smoothed using an L2 filter and various regularisation strengths.

Filtering Data with L2 Regularisation

regularisationR
2014/03/25

Probability of conception versus months.

How Long to Conceive?

R
2014/01/12

Mosaic plot of exposure time versus F number.

Processing EXIF Data

R
2013/12/16

An updated chart showing winners of both men's and ladies' races at Comrades Marathon showing the year and the number of times that the race has been won by each athlete.

Updated Comrades Winners Chart

running
2013/12/14

Map with contours showing unphysical behaviour of contours near border of map.

Contour and Density Layers with ggmap

R
2013/12/14

A misleading plot due to an unfortunate choice of scale on the y-axis.

Amy Cuddy: Your body language shapes who you are

TED Talk
2013/11/27
 

Deriving a Priority Queue from a Plain Vanilla Queue

R
2013/11/26
 

Implementing a Queue as a Reference Class

R
2013/11/24
 

Iterators in R

R
2013/11/14

The Mandelbrot Set showing two points, labelled A and B, and a region which will be zoomed.

Introduction to Fractals

R
2013/11/04
Percolation through a larger lattice at the percolation threshold.

Percolation Threshold: Including Next-Nearest Neighbours

R
2013/11/01

Two empty square lattices with different occupation probability.

Percolation Threshold on a Square Lattice

R
2013/10/30

An empty spiral plot.

Plotting Times of Discrete Events

R
2013/10/19
 

Mounting a sshfs volume via the crontab

Linux
2013/10/06

Bubble plot showing movie rating versus year.

Top 250 Movies at IMDb

web scrapingR
2013/10/03

Flush contents of buffer to disk by right-clicking on the Experts tab and then selecting the Open option.

Flushing Live MetaTrader Logs to Disk

2013/09/18

Dendrogram showing word clusters in the words of William Shakespeare.

Clustering the Words of William Shakespeare

R
2013/09/10

Desktop showing system time and time on MetaTrader platform.

MetaTrader Time Zones

2013/09/09

Word cloud showing the relative frequency of words in the works of William Shakespeare.

Text Mining the Complete Works of William Shakespeare

R
2013/09/05

Heatmap of employees versus problem, showing number of times each problem was reported for each employee. Data are not sorted.

Presenting Conformance Statistics

R
2013/08/27

Histogram of eigenvalues calculated for a collection of small random matrices.

The Wonders of {foreach}

{foreach}R
2013/08/25

Scatter plot of data.

Fitting a Model by Maximum Likelihood

R
2013/08/18
 

Correlations with Uncertainty: Classical Solution

R
2013/08/13

Scatter plot of original data showing error bars.

Correlations with Uncertainty: Bootstrap Solution

R
2013/08/11

Location of log files in MetaTrader file hierarchy.

Finding Your MetaTrader Log Files

2013/08/08

Winners of both men's and ladies' races at Comrades Marathon showing the year and the number of times that the race has been won by each athlete.

A Chart of Recent Comrades Marathon Winners

runningR
2013/07/30

A Conditional Inference Tree for predicting whether or not a runner will finish the Comrades Marathon based on various demographic features and their time at the half-way mark.

Comrades Marathon Inference Trees

runningR
2013/07/19

Box plot of the output from a noisy objective function.

Optimising a Noisy Objective Function

R
2013/07/16

Folders containing code for MetaTrader4 expert advisors.

Compiling Indicators and Expert Advisors

2013/06/25

Proportion of runners finishing the Comrades Marathon as a function of number medals already earned.

Are Green Number Runners More Likely to Bail?

runningR
2013/06/22

Heat map of Comrades Marathon medal count versus age.

The Green Number Effect

runningR
2013/06/18

Boxplot of Comrades Marathon runner age versus race year broken down by gender.

Age Distribution of Comrades Marathon Athletes

runningR
2013/06/18

Number of medals won in the 2013 Comrades Marathon broken down by age group and gender.

Medal Allocations at the Comrades Marathon

runningR
2013/06/09

Spine plot of Comrades Marathon result versus gender.

Comrades Marathon Attrition Rate

R
2013/06/07

Box plot of range and motion on GBP/USD.

Analysis of Cable Morning Trade Strategy

R
2013/05/29

Box plot of age versus gender for two classes.

Balanced Data with {MatchIt}

R
2013/05/23

Scatter plot in xkcd style showing GDP (on log scale) versus education spending (as a percentage of GDP).

xkcd Style Bubble Plot

R
2013/05/23

Chart of GBP/USD showing swing alert indicator.

Swing Alert Indicator

2013/05/23

Conditional inference tree for predicting air quality.

Package {party}: Conditional Inference Trees

{party}R
2013/05/21

Scatter plot of age versus BMI.

Plotting categorical variables

R
2013/05/20

Scatter plot of mass (kg) versus height (m) showing massive overplotting.

Plotting numerical variables

R
2013/05/18
 

Descriptive Statistics

R
2013/05/18
 

Categorical Variables

R
2013/05/12
 

Loading Data from a Tab Delimited File

R
2013/05/12

Chart of GBP/USD showing support-resistance indicator.

Support & Resistance Indicator

2013/05/06

Diagram showing locations of Earth's fleet of geosynchronous satellites.

Locations of Geosynchronous Satellites

R
2013/04/16
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