woodpeckR: coding, one acorn at a time
A Semi-Automated Process for Converting Slides to a Blog Post in RMarkdown
Recently, I adapted slides from one of my talks into a blog post format, with each slide's narration transcribed below it. In my experience, people don't usually post slides this way, and the process of converting a presentation to a blog post wasn't trivial. Here's the process I followed--I hope it helps anyone else who would like to do this too.
greenT part 2: Behind the app
A more detailed explanation of some of the code that makes the greenT app work.
greenT: Exploring grapheme-color synesthesia
An introduction to a Shiny app I built to show friends the inner workings of my brain--and some musings on my experience learning Shiny this year.
%$%: upping your pipe game
I love the magrittr/dplyr pipe: %>%. But it's meant to work with tidyverse functions, and it doesn't always work well with base R functions that take a single data frame column as input. Here, I use data about my friends' pets to explain how a different magrittr pipe, %$%, solves that problem.
Some lessons from rstudio::conf 2020
Some of my thoughts about R and the R community after attending the 2020 rstudio::conf in San Francisco.
If ifelse() had more if's (case_when(), part 2)
In which I learn how to make case_when() behave like a true if/else, including the else part. What happens when you only want to assign particular outcomes to a few cases, without touching the rest? Or if you want to bulk-assign all the unspecified cases to one outcome? The syntax is weird, but it works.
Loading packages efficiently
A trick I sometimes use to load a whole bunch of packages for every script in a project, while saving myself some typing. (Preview image from https://towardsdatascience.com/a-comprehensive-list-of-handy-r-packages-e85dad294b3d)
If ifelse() had more if's
In which I discover dplyr's case_when() function, a vectorized version of ifelse().
Initializing an empty list
When you're using a for loop to fill up a list, sometimes it's a good idea to initialize the list ahead of time, with the right number of elements but with no data. But actually doing this is a little harder than I had anticipated.
(Automatically show output)
A neat trick with parentheses to print the contents of an object you just created, without running another line of code.
prop.table()
Making a frequency table with proportions instead of counts. Preview image from https://twitter.com/lyric_rep/status/1010594530435846144.
with()
A brief introduction to the with() function
Changing individual column names
How to rename individual columns in a data frame, based on the previous names and without using previous names.
The %notin% operator
Why is negating `%in%` such a pain?
Where are my NA's?
I wrote a function to summarize how many `NA`'s are in each column of a data frame. Preview image by Allison Horst, https://github.com/allisonhorst.