# Monthly Archives: October 2011

## Making R’s paste act more like CONCAT

October 31, 2011
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While vector-friendly, R's paste function has a few behaviors I don't particularly like. One is using a space as the default separator:> adjectives> paste(adjectives,"er")> paste(adjectives,"er") "lean er" "fast er" "strong er" #d'oh> paste(adjectives,"er",sep="") "leaner" "faster" "stronger"Empty vectors get an undeserved first class treatment: > paste(indelPositions,"i",sep="") "i"> indelPositions> paste(indelPositions,"i",sep="") "5i"...

## useR! 2011 – Brandon Whitcher: Quantitative Medical Image Analysis

October 31, 2011
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useR2011 – Whitcher View more presentations from rusersla

## R 2.14.0 is released

October 31, 2011
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As scheduled, the first release of the new R 2.14 series is now available for download in source code form. As of this writing, pre-compiled binaries for Windows, Linux and MacOS aren't yet available, but will appear on your local CRAN mirror in the next couple of days. One of the biggest changes in 2.14 is the introduction of...

## useR! 2011 – Lee E. Edlefsen: Scalable Data Analysis in R

October 31, 2011
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useR2011 – Edlefsen View more presentations from rusersla

## useR! 2011 – Ulrike Grömping: Design of Experiments

October 31, 2011
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useR2011 – Gromping View more presentations from rusersla

## Simulation: Efficiency of mean with median Goal: Show the…

October 31, 2011
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Simulation: Efficiency of mean with median Goal: Show the efficiency of the mean when compared with the median using a large simulation where both estimators are applied on a sample of U(0,1) uniformly distributed random numbers. Input: # Goal: Show...

## Multivariate linear mixed models: livin’ la vida loca

October 31, 2011
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I swear there was a point in writing an introduction to covariance structures: now we can start joining all sort of analyses using very similar notation. In a previous post I described simple (even simplistic) models for a single response … Continue reading →

## Example 9.12: simpler ways to carry out permutation tests

October 31, 2011
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In a previous entry, as well as section 2.4.3 of the book, we describe how to carry out a 2 group permutation test in SAS as well as with the coin package in R. We demonstrate with comparing the ages of the female and male subjects in the HELP study.I...

## R 2.14.0 is released!

October 31, 2011
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The new R 2.14.0 is out! Get the source code from here. Take a look at these posts for some miscellaneous advices to make the upgrade easier. Also this thread on stackoverflow and this post contributed by Tal Galili&nbs...