Blog Archives

Matrix Algebra in R: Resources, Videos, Textbooks

December 17, 2009
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Matrix Algebra in R: Resources, Videos, Textbooks

I noticed how John Myles White has posted a useful overview of Matrix Algebra in R. This post lists a couple of other resources that are available on the Internet on the topic, including R resources, online video courses, and online textbooks.Matrix Al...

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Memory Management in R: A Few Tips and Tricks

November 23, 2009
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Memory Management in R: A Few Tips and Tricks

This post discusses a few strategies that I have used to to manage memory in  R.Stack Overflow TipsStack Overflow has a thread on Memory Management Tricks. I tend to follow these suggestions:.ls.objects(): There's a nice function (.ls.objects...

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Generalized Estimating Equations | General, R, and SPSS Resources

November 9, 2009
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Generalized Estimating Equations | General, R, and SPSS Resources

I was recently asked about Generalised Estimating Equations (GEEs). I haven't yet used the technique, but it's on my list of things to learn more about. This post catalogues some of the Internet resources on GEEs.General ResourcesHanley et al...

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Tips for Using StatET and Eclipse for Data Analysis in R

October 29, 2009
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Tips for Using StatET and Eclipse for Data Analysis in R

My favourite editor for conducting analysis in R is the StatET plug-in for Eclipse. This post discusses an assortment of tips and tricks that I've discovered to make this editing environment even better.SearchSearch (Control + H): I maintain projects i...

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Data Mining and R

October 24, 2009
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Data Mining and R

This post lists a few data mining resources in R. I also provide a few observations on the distinction between data mining, data analysis, and statistics as it pertains to the analysis work that I do in psychology.Online ResourcesThe classic book The E...

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Comments on the "R Clinic"

October 19, 2009
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Comments on the "R Clinic"

Theresa Scott runs an R Clinic at Vanderbilt. Researchers bring their questions along to weekly sessions and some answers are posted on this website.  It's great to see the combination of statistical consulting services and public posting of answe...

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Comments on "Ecological Statistics with R"

October 8, 2009
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Comments on "Ecological Statistics with R"

Didrik Vanhoenacker has put together a site called Ecological Statistics with R.The site provides several resources useful to researchers who are new to R. It gives advice on installing R. It discusses how to use several standard techniques (ANOVA...

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Factor Analysis in R

October 7, 2009
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Factor Analysis in R

This post shows an example of running a basic factor analysis in R.Additional Resources:Quick-Rpsych packageJame's Steiger's exampleFactoMineR packageThe Example:The example is based on responses by 117 university students to a 50 item version of the I...

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Efficient Variable Selection in R

October 7, 2009
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Efficient Variable Selection in R

This post sets out my procedure for efficiently and reliably selecting variables from a data.frame in RTHE PROBLEMFor years I have been tormented by the hassle of selecting variables in a data.frame. I often work with psychological datasets with hundre...

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Including R Code in a Blog Post

October 5, 2009
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Including R Code in a Blog Post

This post discusses ways of including formatted code in a blog post.I often write posts that include computer code. This might be R code, SPSS syntax, an Inquisit script, or a Visual Basic Macro.The Problem:Initially I did not know how to include this ...

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