Monthly Archives: March 2010

RcppArmadillo 0.1.0

March 11, 2010
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Besides the new RcppExamples, another new package RcppArmadillo got spun out of Rcpp with the recent release 0.7.8 of Rcpp. Romain and I already had an example of a simple but fast linear model fit using the (very clever) Armadillo C++ library by Conr...

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RcppArmadillo 0.1.0

March 11, 2010
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Besides the new RcppExamples, another new package RcppArmadillo got spun out of Rcpp with the recent release 0.7.8 of Rcpp.Romain and I already had an example of a simple but fast linear model fit using the (very clever) Armadillo C++ library by...

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Variations in the literal representation of Pi

March 11, 2010
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Variations in the literal representation of Pi

The numbers system I am developing attempts to match numeric literals contained in a file against a database of interesting numbers. One of the things I did to quickly build a reasonably sized database of reliable values was to extract numeric literals from a few well known programs that I thought I could trust. R

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t-walk on the wild side

March 11, 2010
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t-walk on the wild side

When I read in the abstract of the recent A General Purpose Sampling Algorithm for Continuous Distributions, published by Christen and Fox in Bayesian Analysis that We develop a new general purpose MCMC sampler for arbitrary continuous distributions that requires no tuning. I am slightly bemused. The proposal of the authors is certainly interesting and

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Clinical Reporting with R

March 11, 2010
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Clinical Reporting with R

One of the main goals of analyzing clinical data is to produce a report. (What, you thought it was to make the world a better place?) The R Project has, of course, all the tools you need to perform the statistical analysis, calculate the tables of results, and present conclusions graphically. But how can you assemble all of that...

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Importing Raster Files in NetLogo without the GIS Extension

March 11, 2010
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I've been working mainly on abstract ABM, and I really don't need all that bells and whistles, and besides I've had some problems when trying to handle the relation between the real coordinate system and NetLogo own system. What I want is to use a GIS ...

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Importing Raster Files in NetLogo without the GIS Extension

March 11, 2010
By

I've been working mainly on abstract ABM, and I really don't need all that bells and whistles, and besides I've had some problems when trying to handle the relation between the real coordinate system and NetLogo own system. What I want is to use a GIS ...

Read more »

RcppExamples 0.1.0

March 10, 2010
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Version 0.1.0 of RcppExamples, a simple demo package for Rcpp should appear on CRAN some time tomorrow. As mentioned in the post about release 0.7.8 of Rcpp, Romain and I carved this out of Rcpp itself to provide a cleaner separation of code that impl...

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RcppExamples 0.1.0

March 10, 2010
By

Version 0.1.0 of RcppExamples, a simple demo package for Rcpp should appear on CRAN some time tomorrow.As mentioned in the post about release 0.7.8 of Rcpp, Romain and I carved this out of Rcpp itself to provide a cleaner separation of code t...

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Puzzle of the week [w10]

March 10, 2010
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Puzzle of the week [w10]

The puzzle in last Saturday edition of Le Monde is made of two parts: Given a 10×10 grid, what is the maximum number of nodes one can highlight before creating a parallelogram with one side parallel to one of the axes of the grid? What is the maximum number of nodes one can highlight before

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