Articles by Jeromy Anglim

Comments on the "R Clinic"

October 19, 2009 | Jeromy Anglim

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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Factor Analysis in R

October 7, 2009 | Jeromy Anglim

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 | Jeromy Anglim

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 | Jeromy Anglim

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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Data Mining and Statistics Video Course

October 3, 2009 | Jeromy Anglim

David Mease has an online course presented with complete videos (Statistics 202: Statistical Aspects of Data Mining ). The course uses Excel and R.I might update this post with a few notes below on what is covered as I get a chance to watch t...
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Blogs on R | Statistics

September 28, 2009 | Jeromy Anglim

What are the current blogs on R? What do they cover?What makes a good blog on R?Of course different readers look for different things, but for me a good blog on R:Provides a Gateway: The blog discovers and shares useful external material and expla...
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Psychology Statistics 101 | R or SPSS

September 28, 2009 | Jeromy Anglim

Dan Wright has placed his Quantitative Methods 1 course online. The course offers instructions both in R and SPSS (PASW).It is an interesting case study in  how to integrate R into a psychology quantitative methods course at the undergraduate leve...
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Structural Equation Modelling in R

September 20, 2009 | Jeromy Anglim

Structural Equation Modelling (SEM) Software is frequently used in psychology. This post discusses the exciting prospect of greater support for SEM in R. ...I have used SEM to:Run confirmatory factor analyses to examine the measurement structure of mul...
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R Community in Australia

September 17, 2009 | Jeromy Anglim

One of the nice aspects of R is the community of users that has built up around it. The open-source model seems to create an orientation of sharing and contribution. Users benefit from R and then they give back in the form of new packages, free documen...
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Social Network Analysis Resources for R

August 17, 2009 | Jeromy Anglim

Social Network Analysis is an increasingly popular tool for modelling dependence structures between social actors. In my department researchers are developing new models for representing such dependence structures (MELNET). In 2007 I gave a talk on my ...
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Learning R for Researchers in Psychology

June 6, 2009 | Jeromy Anglim

R is a powerful environment for statistical computing. Here is a selective list of resources on R with an emphasis on resources useful for researchers in psychology.Psychology specific R resourcesR Notes for Experimental PsychologyWilliam Revelle's Psy...
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Bootstrapping and the boot package in R

May 21, 2009 | Jeromy Anglim

I was recently asked about options for bootstrapping. The following post sets out some applications of bootstrapping and strategies for implementing it in R.I've found bootstrapping useful in several settings:where the statistic I'm interested in is a ...
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