Author Archives: robayedavies

Getting started – working directories, loading data, and a bit more plotting

For this post, I am going to assume that you know about files, folders and directories on your computer. In Windows (e.g. in XP and 7), you should be familiar with Windows Explorer. If you are not, this series of … Continue reading

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Getting started – getting helped

As we get started, we will need help, let’s work on how and where to find that help, and also how to act on it. We will need help Most modern software applications strive to ensure we get what we … Continue reading

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Getting started – a quick word on destinations – plotting

A critical reason for learning to use R is the superior capacity that affords to visualize data. If you learn to plot data with R you are learning to plot data using the best tools now available. There are four … Continue reading

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Getting started – R-Studio, ggplot, installing packages and loading them for use

Install R Revise how to install R, as previously discussed here and here. Installation How do you download and install R? Google “CRAN” and click on the download link, then follow the instructions (e.g. at “install R for the first time”). … Continue reading

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Workflow concerns – how do you organize information?

Information you have to organize 1. articles from literature search – abstracts, results of literature searches, pdfs of articles you have access to, your notes on the articles: — people print things out, write notes on paper, and file this … Continue reading

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I recommend R in the sense that:

[CC attribution: flickr user gnatallica – http://www.flickr.com/photos/gnatallica/5120063269/%5D

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Plot your data

I would start plotting my data almost from the beginning. You can get an impression of how powerful the visualization capacity of R is from this gallery. There are multiple systems for doing graphics in R (cf. in SPSS where you … Continue reading

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Types of sums of squares

https://stat.ethz.ch/pipermail/r-help/2005-April/069923.html http://psych.colorado.edu/wiki/lib/exe/fetch.php?media=labs:learnr:typeiortypeiiiss.pdf http://cran.r-project.org/web/packages/fortunes/vignettes/fortunes.pdf http://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/sstypes http://yihui.name/en/2010/04/rules-of-thumb-to-meet-r-gurus-in-the-help-list/ https://stat.ethz.ch/pipermail/r-help/2006-May/094765.html https://stat.ethz.ch/pipermail/r-help/2006-August/111927.html https://stat.ethz.ch/pipermail/r-help/2003-March/030705.html https://stat.ethz.ch/pipermail/r-help/2008-February/153740.html https://stat.ethz.ch/pipermail/r-devel/2000-May/020714.html https://stat.ethz.ch/pipermail/r-help/2001-October/015984.html http://www.stats.ox.ac.uk/pub/MASS3/Exegeses.pdf http://mcfromnz.wordpress.com/2011/03/02/anova-type-iiiiii-ss-explained/ http://stats.stackexchange.com/questions/23197/type-iii-sum-of-squares-from-sas-and-r http://stats.stackexchange.com/questions/6208/should-i-include-an-argument-to-request-type-iii-sums-of-squares-in-ezanova

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Getting started in R – me and other people on how to get started

As noted previously, there are a huge number of resources on how to get started with R, available online. I will be making my own contributions to this genre but before I really get rolling with that, it is fair … Continue reading

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Getting started in R – other people on why R?

Why use R? For inside-r, it’s because R is free, a language, a system with great graphics capabilities, a flexible toolkit, access to the cutting-edge, and a vibrant and supportive user community. For Kevin Goulding, the reasons also include that … Continue reading

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