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Tidy evaluation in R, or tidyeval for short, is a pretty robust topic. But in this episode of Do More With R, Ill focus on one specific and useful task. Hi, Im Sharon Machlis with IDG Communications. And Im going to demonstrate how to use tidyeval so you can incorporate functions from packages like dplyr and ggplot2 inside your own custom functions. If youve tried to do this before, you may have run into problems using standard R code. Tidyeval solves one important one. Even though the computer-science theory behind it is somewhat advanced and I definitely dont understand all of it; using tidy evaluation for this specific purpose isnt really that hard. Lets look at an example with the ever-popular mtcars sample data set. Heres how I might do a scatterplot of miles per gallon by weight, using dplyr to filter for higher-mpg cars only. And Ive added a few style tweaks to the default ggplot graph: Now Id like to create a function with this code, so I can easily re-use my
