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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.

It’s time to add bslib to your `shinyapp` snippet

R

Shiny

bslib

library(shiny) is better with library(bslib), so let’s make it official and update our shinyapp snippet together.

Add last rendered or modified time to Quarto

Quarto

Extensions

Introducing now, a Quarto extension that adds the time right now, anywhere in your document.

Automated Image Overflow Detection for xaringan or remark Slides

R

Slides

xaringan

Using chromote and a little JavaScript to detect image overflow issues in {xaringan} or remark slides.

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…

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!

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.

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.

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.

Wordle Guess Helper

R

JavaScript

js4shiny

Picking words to guess in Wordle. It’s only fun if you can solve it with R.

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.

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.

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.

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.

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.

Little Inline Color Boxes

R

Tips

Color

Web Development

htmltools

Little cirlces with color previews, with R.

Printing xaringan slides with chromote

R

xaringan

xaringanExtra

Slides

Tips

Scripts

Create PDF versions of complicated xaringan slides using {chromote} and a little magic.

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.

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.

A Calendar in Your R Console

R

Scripts

Productivity

Interesting Uses of R

Print a nicely-formatted calendar in your R console.

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.

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.

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.

Let’s move on from iris

R

Scripts

About iris and how to move on.

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.

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.

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}

XML: The Recursive Programming Workout

R

Tips

XML

It’s like programming Crossfit but with less sweating.

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.

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.

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.

Custom Discrete Color Scales for ggplot2

R

ggplot2

Visualization

Tips

Building discrete color scales for ggplot2 with some cool features for binary categorical variables.

The Colors of xcolor

R

Scripts

Color

Using the tidyverse to gather the colors defined in the LaTeX package xcolor

A Printable Custom Weekly Planner with ggplot2

R

ggplot2

Productivity

Scripts

Use ggplot2 to organize your life.

Popular Letters in Baby Names, Animated

R

gganimate

ggplot2

Visualization

An animation of letter popularity in baby names

The Redacted, Text-Extracted Mueller Report

R

Text

Visualization

Visualizing extracted text from the Redacted Mueller Report using ggpage.

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.

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.

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 many other areas of his political career, Trump has broken with tradition by hiding his schedule from…

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.

A Holiday RStudio Theme

R

RStudio

Color

Themes

Bring yuletide cheer and seasons greatings to RStudio.

Animate Xaringan Slide Transitions

xaringan

Tips

R

Add animations to xaringan slide transitions with animate.css

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.

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 examples where…

Pandoc Syntax Highlighting Examples

pandoc

Writing

Color

Themes

The R Markdown book lists many syntax highlighting color schemes:

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 thought into it. Tonight I was…

My ggridges Twitter Header

Blog

First, I created a 1500 x 500 pixel image with the letter g.

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.

Add a Generated Table of Contents Anywhere in RMarkdown

R Markdown

pandoc

knitr

R

Tips

blogdown

Writing

Links: Github Gist

Searching for “gun control” after a mass shooting

Data Analysis

Visualization

Last updated: 2018-03-05 10:00

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

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.

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…

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.

Quote: Albert Einstein

Every day I remind myself that my inner and outer life are based on the labors of other people, living and dead, and that I must exert myself in order to give in the same…

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…

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…

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…

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.

Sitting by the fire

Photos

Math and Code

R

Writing

This article is just a quick demonstration of the power of Octopress with Pandoc, and uses all of the common elements of a data analysis write up. In fact, I stole most of…

Minneapolis: INFORMS 2013

Photos

The pupsters at the window

Photos

The pupsters at the window.

Responding to peer reviewers with Pandoc

git

Markdown

pandoc

Productivity

Workflow

I’m in the process of responding to the second round of peer reviews of a paper I’ve spent considerable time working on over the past year. Of course, this time around I’ve…

The Pandoc Markdown rabbit hole

Apps

Markdown

Productivity

Workflow

Writing

I’ve recently taken a hard dive into the deeply fragmented world of plaintext formatted markup languages. I currently have about 90 tabs open, each a winding, twisting trail…

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” really…

Up and running…

Update: No more Wordpress! It’s all Octopress up in here now.

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.

Go Postal Sunset

Photos

Post office near my house

Visualizing PhysioNet Challenge Patient Data with R

Data Analysis

R

Visualization

In working with the PhysioNet Challenge 2012 data set, it can often be very difficult to assess the condition of a given patient, or the trends within those the time series…

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 the process of writing a new book on educating engineers…

New Website

Blog

Well hello there.