My Blog

Mostly things I’ve figured out and wanted to share with you. Or remember later. Or things I wrote about because I wanted to learn something new. Occasional ramblings, sometimes thoughts.

Read and Visualize your Twitter Archive

R
Twitter
Personal Data

Using R to read and visualize my Twitter archive data. Featuring {ggiraph}, {ggplot2}, {jsonlite}, {dplyr} and more…
Dec 7, 2022
33 min

countdown v0.4.0 – Now on CRAN!

R
My Projects
Slides
countdown
Shiny
JavaScript
Apps
Announcement
xaringan
Quarto

countdown v0.4.0 is now available on CRAN with a ton of new features!
Aug 15, 2022
13 min

Process Profile Pictures with magick

R
Images
Interesting Uses of R

Process a directory full of profile pictures, resizing and cropping the images to be centered around faces.
Jul 12, 2022
12 min

xaringanExtra v0.6.0 — Now on CRAN!

R
My Projects
xaringan
xaringanExtra
Slides
Announcement

xaringanExtra v0.6.0 is now available on CRAN! Plus some new features.
Jun 7, 2022
3 min

Saving Daylight Time?

R
Visualization
ggplot2

How much daylight do cities across the world get throughout the year? Does Daylight Saving Time really save any daylight? A visualization to explore these questions.
Mar 12, 2022
24 min

Wordle Guess Helper

R
JavaScript
js4shiny

Picking words to guess in Wordle. It’s only fun if you can solve it with R.
Feb 21, 2022
27 min

branchMover: A Shiny app for moving the default branch of your GitHub repos

R
usethis
GitHub
git
Apps
Shiny
RStudio

Introducing branchMover, a Shiny app slash RStudio addin for coordinated default branch changes across your GitHub repositories.
Nov 2, 2021
4 min

Pull Request Flow with usethis

R
usethis
Productivity
Workflow

Choose your own adventure and get in the ‘usethis’ pull request flow with this flow chart.
Oct 7, 2021
24 min

Signed and verified: signed git commits with Keybase and RStudio

R
git
GitHub
RStudio
Tutorials

Setting up signed git commits with a Keybase GPG key that works with RStudio.
Sep 13, 2021
12 min

Create a GitHub issue from a reprex with shrtcts

R
Addin
Shortcuts
GitHub
reprex

Turn a reprex into a GitHub issue using a custom RStudio addin with shrtcts.
Sep 3, 2021
9 min

Questions, answers, and reprexes

Teaching
Learning
CSS
Programming
reprex

A “CSS Battle” YouTube video made me ponder metacognition in programming. I had questions, reprex gave me answers.
Mar 16, 2021
7 min

Little Inline Color Boxes

R
Tips
Color
Web Development
htmltools

Little cirlces with color previews, with R.
Mar 12, 2021
1 min

Printing xaringan slides with chromote

R
xaringan
xaringanExtra
Slides
Tips
Scripts

Create PDF versions of complicated xaringan slides using {chromote} and a little magic.
Jan 25, 2021
3 min

xaringan Playground: Using xaringan to learn web development

R
xaringan
Presentation
CSS
Web Development

Making slides with xaringan is a great way to learn more about CSS and web development.
Jan 21, 2021
3 min

Setting up a new MacBook Pro

R
Tips
Programming
Twitter

A big post with all the Mac apps and command line utilities I use everyday.
Dec 1, 2020
4 min

A Calendar in Your R Console

R
Scripts
Productivity
Interesting Uses of R

Print a nicely-formatted calendar in your R console.
Sep 21, 2020
5 min

R Colors in CSS for R Markdown HTML Documents

Color
xaringan
Tips
CSS
R Markdown
R
Web Development
Shiny
htmltools

Use R’s colors in HTML R Markdown documents, slides and Shiny apps with this set of CSS stylesheets.
Sep 14, 2020
5 min

Sharing Your xaringan Slides

R
xaringan
xaringanExtra
Slides

How to share your xaringan slides in style, on social media sites and embedded in your web page.
Sep 1, 2020
10 min

Video: Debugging JavaScript You Wrote in R

R
RStudio
JavaScript
Debugging
Web Development
htmlwidgets
Video

A pseudo-live-streamed walkthrough as I debug some buggy JavaScript written in R for a {reactable} htmlwidget.
Jul 20, 2020
0 min

Let’s move on from iris

R
Scripts

About iris and how to move on.
Jun 9, 2020
2 min

Better Progressive xaringan Slides with CSS and :last-of-type

R
xaringan
xaringan Tip
CSS
Slides

A few CSS rules for focused, progressively revealed lists and R code chunks in xaringan slides.
May 20, 2020
4 min

Announcing xaringanthemer v0.3.0!

My Projects
Announcement
xaringanthemer
xaringan
Themes

xaringanthemer is now on CRAN with lots of new features to make your xaringan slides awesome.
May 8, 2020
11 min

Make A Shortcut for Anything in RStudio with shrtcts

RStudio
R
My Projects
Addin
Shortcuts

Quickly turn any R function or code into an RStudio addin with {shrtcts}
May 2, 2020
7 min

XML: The Recursive Programming Workout

R
Tips
XML

It’s like programming Crossfit but with less sweating.
Nov 5, 2019
4 min

xaringan Tip: Add A Logo to All of Your Slides

R
Tips
xaringan

Add a logo to all of your xaringan slides without using a background image.
Oct 16, 2019
2 min

Shiny Tip: Choose Where to Run App with an Option

R
Shiny
Tips

Quick Shiny Tip: How to use the shiny.launch.browser option to choose where RStudio runs your app.
Oct 13, 2019
1 min

Twitter’s Feelings About Programming Languages

R
rtweet
Data Analysis
Visualization
Programming

A deep dive into an informal, free-form survey about experiences with programming languages.
Oct 8, 2019
16 min

Custom Discrete Color Scales for ggplot2

R
ggplot2
Visualization
Tips

Building discrete color scales for ggplot2 with some cool features for binary categorical variables.
Aug 15, 2019
6 min

The Colors of xcolor

R
Scripts
Color

Using the tidyverse to gather the colors defined in the LaTeX package xcolor
Aug 7, 2019
2 min

A Printable Custom Weekly Planner with ggplot2

R
ggplot2
Productivity
Scripts

Use ggplot2 to organize your life.
Jun 22, 2019
11 min

Popular Letters in Baby Names, Animated

R
gganimate
ggplot2
Visualization

An animation of letter popularity in baby names
May 17, 2019
12 min

The Redacted, Text-Extracted Mueller Report

R
Text
Visualization

Visualizing extracted text from the Redacted Mueller Report using ggpage.
Apr 18, 2019
4 min

A Blogdown New Post Workflow with Github and Netlify

blogdown
R
Writing

A workflow for writing new posts built around GitHub pull requests and Netlify deploy previews.
Mar 18, 2019
9 min

Style knitr Code Output Appearance in HTML with Custom CSS Classes

R
knitr
R Markdown
Tips

Apply custom CSS classes to code chunk outputs to differentiate between regular outputs and messages, warnings, and errors.
Mar 5, 2019
1 min

President’s Day (As In: What Does President Trump Do With His Day?)

R
rtweet
ggplot2
Visualization
On February 3rd, Axios released President Trump’s daily schedule. As in…
Feb 27, 2019
33 min

Trump Tweet Time: An 8-bit “Executive Time” Game

R
rtweet
Shiny
Apps

A silly game to guess the activity on Trump’s schedule while he was tweeting.
Feb 9, 2019
1 min

A Holiday RStudio Theme

R
RStudio
Color
Themes

Bring yuletide cheer and seasons greatings to RStudio.
Dec 5, 2018
2 min

Animate Xaringan Slide Transitions

xaringan
Tips
R

Add animations to xaringan slide transitions with animate.css
Dec 3, 2018
1 min

The Greatest Twitter Scheme of All Time?

R
Twitter
rtweet

In which I investigate a very cool thing that someone claims to have done on Twitter. Using R and the rtweet package.
Aug 24, 2018
3 min

Decouple Code and Output in xaringan slides

R
xaringan
In this post I demonstrate how the ref.label knitr chunk option can be used to decouple code chunks and their outputs in xaringan presentations. I give two…
Aug 16, 2018
6 min

Pandoc Syntax Highlighting Examples

pandoc
Writing
Color
Themes
The R Markdown book lists many syntax highlighting color schemes:
Jul 6, 2018
0 min

Find, count and list tags in all blogdown posts

blogdown
Scripts
R
Tips
I’ve been using blogdown for a while now and have basically been randomly selecting tags as I write each post without putting too much…
Apr 29, 2018
5 min

My ggridges Twitter Header

Blog
First, I created a 1500 x 500 pixel image with the letter g.
Mar 30, 2018
1 min

Reuse Rmd fragments in package vignettes, README, blog posts and more

R
Tips
R Markdown
Writing

Use knitr’s “child chunks” to reuse bits of documentation.
Mar 5, 2018
3 min

Add a Generated Table of Contents Anywhere in RMarkdown

R Markdown
pandoc
knitr
R
Tips
blogdown
Writing
Links: Github Gist
Feb 28, 2018
3 min

Searching for “gun control” after a mass shooting

Data Analysis
Visualization
Last updated: 2018-03-05 10:00
Feb 19, 2018
18 min

Highlight lines without breaking the code in Xaringan

R
Presentation
xaringan
Update 2: This feature has been added to the latest version of xaringan! See it in action: https://slides.yihui.name/xaringan/#29
Jan 23, 2018
2 min

Presenting Smart Home Activity Profiles at INFORMS 2017

Presentation
Data Analysis
Personal Data
Research
I had a great time connecting with old and new friends and colleagues this past week at the INFORMS 2017 Annual Meeting.
Oct 26, 2017
0 min

Convert R Markdown (Rmd) Files to R Scripts

pandoc
R
Scripts
Workflow
R Markdown
tl; super dr: I’m really not sure how knitr::purl() escaped my attention – maybe I thought it didn’t do something I felt was necessary at the time – but if you’ve stumbled…
Oct 17, 2017
3 min

Lookup Citation Counts with R and rcrossref

R
Scripts
Research
Tips
An R script and function that takes a citation key as a unique identifier for a paper and outputs the paper’s citation count.
Oct 21, 2014
4 min

Quote: Albert Einstein

Every day I remind myself that my inner and…
Sep 9, 2014
0 min

Upcoming Code & Data Boot Camp

Data Analysis
R
Today, Dr. Shabbir Ahmed spoke at USF at our lecture series on Stochastic Integer Programming methods. It was high-level and broad and unfortunately he didn’t get into many of the “nitty-gritty”…
Apr 4, 2014
1 min

Cream with your coffee?

R
Shiny
You receive an excessively hot cup of coffee at your local coffee shop. As it’s the first cup of the day, your main objective is to consume the caffeine as quickly as…
Mar 4, 2014
5 min

Remember markdown compile commands with bash

Scripts
Tips
pandoc
Markdown
I write everything in markdown and use pandoc nearly daily. It’s fast, easy, powerful and highly customizable. It handles math like a pro, and the recent addition of YAML headers makes it easier than ever to…
Jan 30, 2014
2 min

The Book of Us

Music
My little sister got married in November (and then turned 24 in December), so I wrote her a birthday/belated wedding song for her and her new husband.
Jan 12, 2014
1 min

Sitting by the fire

Photos
Jan 11, 2014
0 min

Math and Code

R
Writing
This article is just a quick…
Jan 11, 2014
2 min

Minneapolis: INFORMS 2013

Photos
Oct 7, 2013
0 min

The pupsters at the window

Photos
Sep 12, 2013
0 min

Responding to peer reviewers with Pandoc

git
Markdown
pandoc
Productivity
Workflow
I’m in the process of responding to the second round of peer…
Aug 9, 2013
2 min

The Pandoc Markdown rabbit hole

Apps
Markdown
Productivity
Workflow
Writing
I’ve recently taken a hard…
Jul 31, 2013
5 min

Use Google Forms and R to track data easily

Apps
Data Analysis
Personal Data
R
Visualization
I’m going to show you a quick-and-dirty way to use Google Forms and a smartphone for in-the-field data collection. Of course, for me “in-the-field data collection”…
Jul 24, 2013
4 min

Up and running…

Update: No more Wordpress! It’s all Octopress up in here now.
May 30, 2013
0 min

The End of Stanford?

…the center of gravity at the university appears to have shifted. The school now looks like a giant tech incubator with a football team.
May 30, 2013
0 min

Go Postal Sunset

Photos
May 28, 2013
0 min

Visualizing PhysioNet Challenge Patient Data with R

Data Analysis
R
Visualization
In working with the PhysioNet Challenge 2012 data set, it can often…
Apr 11, 2013
3 min

Educating Engineers for Sustainability

Blog
I had the great pleasure of spending some time with Dr. Richard Fenner, of the University of Cambridge, who is in…
Oct 3, 2012
1 min

New Website

Blog
Well hello there.
Jul 16, 2012
0 min
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