Blog Archives

How to plot three categorical variables and one continuous variable using ggplot2

May 3, 2012
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How to plot three categorical variables and one continuous variable using ggplot2

This post shows how to produce a plot involving three categorical variables and one continuous variable using ggplot2 in R. The following code is also available as a gist on github. 1. Create Data First, let's load ggplot2 and create some data to work...

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Getting Started with JAGS, rjags, and Bayesian Modelling

April 10, 2012
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This post provides links to various resources on getting started with Bayesian modelling using JAGS and R. It discusses: (1) what is JAGS; (2) why you might want to perform Bayesian modelling using JAGS; (3) how to install JAGS; (4) where to find furth...

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Correlation Resources: SPSS, R, Causality, Interpretation, and APA Style Reporting

July 17, 2011
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This post provides links to a range of resources related to the use and interpretation of correlations. I wanted to provide a page with links to a number of additional resources that would be useful both for those of my students who might be keen to le...

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Guide to Getting Started with R: 2011 Update

May 4, 2011
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Guide to Getting Started with R: 2011 Update

In mid-2009, I wrote a post on getting started with R. A lot has happened in the world of R over the last two years. New books, videos, online documentation, blogs and other resources have emerged. New community structures have emerged. As such I've gi...

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R Optimisation Tips using Optim and Maximum Likelihood

February 20, 2011
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R Optimisation Tips using Optim and Maximum Likelihood

This post summarises some R modelling tips I picked up atAMPC2011.I got some tips from a tutorial on parameter estimationput on by Scott Brownfrom the Newcastle Cognition Lab.The R code used in the tutorial is available directly hereor from the confer...

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R versus Matlab in Mathematical Psychology

February 20, 2011
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R versus Matlab in Mathematical Psychology

I recently attended the 2011 Australasian Mathematical Psychology Conference.This post summarises a few thoughts I had on the use of R, Matlab and othertools in mathematical psychology flowing from discussions with researchers atthe conference.I wanted...

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Reasons for Transitioning to Vim: Bringing LaTeX, R, Sweave and More under One Roof

January 10, 2011
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Reasons for Transitioning to Vim: Bringing LaTeX, R, Sweave and More under One Roof

This post describes the reasons for my transition to Vim.Brief BackgroundOver the years I've used a lot of different text editors on Windows.In general, I've used whatever text editor came with a program.When I started using R, I moved from Rgui throug...

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Video of Reproducible Research with R: Melbourne R Users 1st Dec 2010

December 13, 2010
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As previously mentionedI gave a talk at Melbourne R Users Group titled "Reproducible Research and R Workflow". It covered technologies including LaTeX, Sweave, R, make, Eclipse, and git. This post shares the video. I'd like to thank Pedro Olaya for ...

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R Workflow: Slides from a Talk at Melbourne R Users (1st Dec 2010)

December 1, 2010
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I gave a presentation at Melbourne R Userson the topic of R Workflow. The presentation covered R code organisation, and useful R related tools including Eclipse, StatET, Git, make, Sweave and LaTeX. Also, the slides from the presentation provide link...

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Sweave Tutorial 3: Console Input and Output – Multiple Choice Test Analysis

November 30, 2010
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This post provides an example of using Sweave to perform an item analysis of a multiple choice test. It is designed as a tutorial for learning more about using Sweave in a mode where console input and output is displayed. Copies of all source code a...

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