Below please find links to programming tutorials and documentation that previous students have found useful!
R:
R-Bloggers Tutorial Compendium
Coding Club Tutorials
Data Analysis and Visualization in R for Ecologists
TidyVerse Style Guide
A Compendium of Clean Graphs in R
R Markdown Cheatsheet
ggplot Cheatsheet
Python:
Data Analysis and Visualization in Python for Ecologists