R

Here are a few tutorials and crib-notes I've cooked up whilst flailing my way up the sometimes steep learning curve of R.

Programming in R

• The R type system - from the programmer's point of view, the most unique thing about R is it's type system.
• Environments in R - how does R bind symbols to values?
• String functions in R
• R String processing - using capturing regular expressions in R
• How to send an HTTP PUT request from R - why RCurl is better then httpRequest
• Object oriented programming in R - S4 classes

Working with data in R

• Select operations on R data frames
• Joining data frames in R
• SQL group-by in R
• Pivot tables in R
• CouchDB and R - accessing Couch's ReSTful API with RCurl and RJSONIO
• MySQL and R

Graphics in R

• How to plot a graph in R
• Drawing heatmaps in R
• Engineering data analysis with R and ggplot - notes on a talk by Hadley Wickham

Here are several examples of graphics with R done as part of my series on the book Using R for Introductory Statistics, but here linked by the kind of plots demonstrated.

• plotting currency data
• boxplots and scatterplots on marathon runners dataset
• scatterplots with regression lines on problems from UsingR Chapter 3
• lattice
• boxplots, scatterplots, regression lines and dendrograms on the mtcars dataset
• density plots of probability distributions
• histogram/density plots and qqnorm plots

Using R for Introductory Statistics

...more posts on the book Using R for Introductory Statistics.

More R resources

A few more good resources for learning R:

• R programming for those coming from other languages By John D. Cook
• R for programmers from Norm Matloff at UCDavis.
• Unit Testing in R: The Bare Minimum By John Myles White
• The R Inferno - abandon hope!
• bioconductor - if you want to do biology with R
• R-bloggers - loads of great articles

All R related content on Digithead's lab notebook