Blog Archives

Model Validation: Interpreting Residual Plots

July 18, 2011
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Model Validation: Interpreting Residual Plots

When conducting any statistical analysis it is important to evaluate how well the model fits the data and that the data meet the assumptions of the model. There are numerous ways to do this and a variety of statistical tests to evaluate deviations from model assumptions. However, there is little general acceptance of any of the statistical tests. Generally...

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GLMM Hell

July 7, 2011
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GLMM Hell

I have been starting to analyze some data I have of repeated counts of salamanders from 5 plots over 4 years. I am trying to develop a predictive model of salamander nighttime surface activity as a function of weather variables. The repeated counting l...

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More on R-Studio

March 22, 2011
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More on R-Studio

Here's a link to keyboard shortcuts for the RStudio IDE. RStudio has replaced EMacs, Aquamacs, Tinn-R, Bluefish, and even Komodo Edit as my preferred R IDE/editor.http://gettinggeneticsdone.blogspot.com/2011/03/rstudio-keyboard-shortcut-reference-pdf.h...

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New R IDE

March 8, 2011
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New R IDE

I'm always looking for ways to improve my workflow and overall academic efficiency. I've tried a variety of text editors, GUIs, and integrated development environments (IDEs) for R. I have some preferences but I haven't found anything that I'm complete...

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Introductory R Books

January 31, 2011
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Introductory R Books

Here's a link to another blog compiling information and recommendations are introductory books on R (not statistics books that use R).  I thought this might be useful for people.http://csgillespie.wordpress.com/2011/01/28/r-programming-books-updated/

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R GUIs, IDEs, and text editors

January 18, 2011
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R GUIs, IDEs, and text editors

When deciding what program to write your R code in it is important to consider a number of factors so you can keep organized and work efficiently.  I found this article useful for getting started.  Text editors include syntax highlightin...

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Why use R

December 16, 2010
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Why use R

Here's a link to a blog that lists some reasons to use Rhttp://blog.fosstrading.com/2010/12/why-use-r.html

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Learning R

December 9, 2010
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Learning R

I have had to be primarily self taught in R and I still have a long way to go.  I like R way better than SAS but the documentation in SAS is way better (that's what happens when you pay people to do it full time).  However, there are innumera...

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R Workflow

December 7, 2010
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R Workflow

When working with R you end up using a large number of datasets, packages, functions, objects, output files, workspaces, etc.  It can get a bit overwhelming trying to keep everything organized.  That is why a consistent, well-organized workf...

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JAGS – Bayesian Analysis

December 6, 2010
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JAGS – Bayesian Analysis

JAGS is used for Bayesian analysis using MCMC and stands for Just Another Gibbs Sampler.  It is an alternative to WinBUGS and can be accessed through R just like WinBUGS (via R2jags or RJags).  It will work on a Mac unlike WinBUGS.  The ...

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