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"...

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useR! 2011 – Brandon Whitcher: Quantitative Medical Image Analysis

October 31, 2011
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useR! 2011 – Brandon Whitcher: Quantitative Medical Image Analysis

useR2011 – Whitcher View more presentations from rusersla

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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...

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

October 31, 2011
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useR! 2011 – Lee E. Edlefsen: Scalable Data Analysis in R

useR2011 – Edlefsen View more presentations from rusersla

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useR! 2011 – Ulrike Grömping: Design of Experiments

October 31, 2011
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useR! 2011 – Ulrike Grömping: Design of Experiments

useR2011 – Gromping View more presentations from rusersla

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Simulation: Efficiency of mean with medianGoal: Show the…

October 31, 2011
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Simulation: Efficiency of mean with medianGoal: Show the…

Simulation: Efficiency of mean with medianGoal: 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...

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Last chance to enter the $20,000 "Applications of R" contest

October 31, 2011
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Don't forget that midnight tonight (Pacific Daylight Time) is the deadline to submit your draft entry for the Applications of R in Business Contest, with $20,000 in prizes up for grabs from Revolution Analytics. You'll still be able to edit your entry during the public review period (until November 30), but no new entries will be accepted for the...

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Multivariate linear mixed models: livin’ la vida loca

October 31, 2011
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Multivariate linear mixed models: livin’ la vida loca

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 →

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Example 9.12: simpler ways to carry out permutation tests

October 31, 2011
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Example 9.12: simpler ways to carry out permutation tests

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...

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R 2.14.0 is released!

October 31, 2011
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R 2.14.0 is released!

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...

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