Posts Tagged ‘ R ’

GillespieSSA 0.5-1 is released

January 15, 2008
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GillespieSSA 0.5-1 is released

I just uploaded GillespieSSA 0.5-1 to CRAN. Now it’s just a matter of days before it has propagated itself across all CRAN mirrors. This version consists primarily of revisions I made in response to the reviewer comments on the paper … Continue reading →

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Quantile regression in R

January 5, 2008
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Quantile regression in R

Roger Koenker, a quantile regression crusader, has an R package that implements the procedure. It is called quantreg, and it is documented here. This package has apparently been around for quite some time, but I was only recently turned on to quantile ...

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A bugfix release for rjags

December 18, 2007
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A bugfix release for rjags

Several people have written in to tell me that rjags crashes if you  re-run a modelling script in the same R session.  The crash is caused by a memory management bug in the JAGS library that is triggered when you … Continue reading →

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Rattle: an R GUI

December 16, 2007
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Rattle: an R GUI

Rattle is a graphical interface to R. It supports basic data management tasks, as well as a number of different modeling functions. I haven’t had a chance to test it out yet since I don’t have my R installation  completely up to date, but it looks promising. For all of R’s strengths, one weakness is

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Linear panel data models in R: The PLM package

November 10, 2007
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Linear panel data models in R: The PLM package

The plm package for R lets you run a number of common panel data models, including The fixed effects (or within) estimator The random effects GLS estimator It also allows for general GLS estimation, as well as GMM estimation, and includes a feature for heteroscedasticity consistent covariance estimation. It’s very easy to use, it simply

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Changing the fonts in R plots

October 28, 2007
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Changing the fonts in R plots

Tweet I use R to do almost all of my statistical analysis and plotting. It has a very steep learning curve but once you get into it, it’s very powerful and you can customise almost anything. The only problem is that these changes are not...

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Quick-R: a great R tutorial site

October 23, 2007
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Quick-R: a great R tutorial site

Quick-R, by Robert Kabacoff, is a wonderful R introduction site. It covers data management, basic and advanced statistics, and graphing in R, and it is aimed at an audience that has previous experience using other packages (such as SAS or Stata) that w...

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GillespieSSA 0.3-1 released

October 4, 2007
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GillespieSSA 0.3-1 released

I recently rolled up the new version of the GillespieSSA package, version 0.3-1. The tar ball of the new version is posted on its web page (here). I also submitted it to CRAN so in (due time) it should appear … Continue reading →

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Special Volume of JSS on Ecology and Ecological Modelling in R

October 3, 2007
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Special Volume of JSS on Ecology and Ecological Modelling in R

The latest issue Journal of Statistical Software is a special volume on Ecology and Ecological Modelling in R. This has been in the woodwork for quite some time now and it is nice to finally to see this out “in … Continue reading →

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R video tutorial number 2

October 2, 2007
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R video tutorial number 2

READ TEXT FILES, RUN MODELSThe Decision Science News R video tutorials continue with number 2. (If you missed that last one, you will want to watch R Video Tutorial Number 1 first.) The Goldstein pedometer dataset can be downloaded from http://www.dangoldstein.com/flash/Rtutorial2/pedometer.csv Topics covered this week include:Tricking R into starting in your working directory Reading in text

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