Table of Contents

GNU R

The GNU R programming language is often paired with posit's RStudio Desktop IDE and a suit of libraries (language packages) known as tidyverse (includes dplyr and ggplot2).

You can also find a web interface to Rstudio on rhea (also Remote Access).

Tutorials contains additional resources.

See R Issues for log of debugged problems.

Notes

na.action

When adding module residuals back to a dataframe, you need residuals() to return the same length as the input data.frame. use lm(na.action=na.exclude).

For example, 

d <-  data.frame(x=c(1:4,NA),y=1:5);
m <- lm(x~y,d,na.action=na.exclude);
nrow(d); 
length(m$residuals); 
length(residuals(m))
   [1] 5
   [1] 4
   [1] 5

This avoids the error 

Error in `$<-.data.frame`(`*tmp*`, ...
  replacement has 237 rows, data has 348