Posts Tagged ‘ R ’

Heuristics for statistics

January 28, 2008
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Heuristics for statistics

SIMPLE WAYS TO DETECT AND COMMUNICATE STATISTICAL EFFECTS Decision Science News is fond of heuristics and the Simonian view that for many problems organisms face, optimization is a fiction and satisficing makes us smart. Statistics is an area in which it is easy to see precision that isn’t there and find “optima” in problems that

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ERGMs in R

January 23, 2008
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ERGMs in R

Developers of statnet, a collection of packages for R for fitting Exponential Random Graph Models (ERGM), issued a major update. First change is that the main package is now called ergm. Secondly, a set of additional packages has been made available. Apart from package network, that provides a class system for relational data on which

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Resources for S4 classes and methods

January 23, 2008
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Resources for S4 classes and methods

Learning the programming in the new S4 system of classes and methods in R can be quite cumbersome, even though the methods package is very well documented. That is why I collected some of the info and materials that I am aware of on a separate page here. I warmly welcome any suggestions for extending

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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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