UPDATE: Some problems arose with my previous host so I have now updated the links here and elsewhere on the blog.
The companion web site for Serious Stats has a zip file with R scripts for each chapter. This contains examples of R code and and all my functions from the book (and a few extras). This is a convenient form for working through the examples. However, if you just want to access the functions it is more convenient to load them all in at once.
The functions can be downloaded as a text file from:
More conveniently, you can load them directly into R with the following call:
In addition to the Serious Stats functions, a number of other functions are contained in the text file. These include functions published on this blog for comparing correlations or confidence intervals for independent measures ANOVA and functions my paper on confidence intervals for repeated measures ANOVA.