Monthly Archives: December 2009

A web application for R’s ggplot2

December 7, 2009
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One of the exciting new frontiers for R programming is of creating website interfaces to R code. At the forefront of this domain is a young and (very) bright man called Jeroen Ooms, whom I had the pleasure of meeting at useR 2009 (press the link to see his presentation). Today Jeroen announced a new version (0.11)

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pgfSweave now on CRAN

December 6, 2009
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At long last pgfSweave has finally made its way to CRAN. http://cran.r-project.org/web/packages/pgfSweave/index.html The pgfSweave R package is about speed and style of graphics. For speed, the package provides capabilities for “caching” graphics generated with Sweave on top of the caching funcitonality of cacheSweave. For style the pgfSweave package facilitates the integration of R graphics with

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Create factor variables in R

December 6, 2009
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Create factor variables in R

Instead of the factor() function which usually applies after defining a vector there’s the gl() base function to do this in one step, eg freq <- c(204,6,1,211,13,5,357,44,38,92,34,49) row <- gl(4,3,length=12) col <- gl(3,1,length=12) > col 1 2 3 1 2 3 1 2 3 1 2 3 Levels: 1 2 3 tt <- data.frame(freq,row,col) > xtabs(tt) col row   1   2   3 1 204   6  

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digest 0.4.2

December 6, 2009
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digest version 0.4.2 is now on CRAN. This new version features a fix by Henrik Bengtsson who also joined the R-Forge-hosted digest project.

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digest 0.4.2

December 6, 2009
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digest version 0.4.2 is now on CRAN. This new version features a fix by Henrik Bengtsson who also joined the R-Forge-hosted digest project.

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digest 0.4.2

December 6, 2009
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digest version 0.4.2 is now on CRAN. This new version features a fix by Henrik Bengtsson who also joined the R-Forge-hosted digest project.

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Design of Experiments – Blocking and Full Factorial Experimental Design Plans

December 6, 2009
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When considering using a full factorial experimental design there may be constraints on the number of experiments that can be run during a particular session, or there may be other practical constraints that introduce systematic differences into an experiment that can be handled during the design and analysis of the data collected during the experiment. Blocking

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The animation package

December 5, 2009
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The animation package

The "animation" package is a good teaching tool to demonstrate some key concepts in a introductory statistics course.

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Two more R related web sites

December 5, 2009
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Two more R related web sites

R bloggersFree statistics e-booksPlanet R

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R twitts…

December 5, 2009
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R twitts…

You may already know this… #rstats I think I might get an account when get to connect to the Internet in my mobile phone

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