Just checked on the 70000+ simulations I submitted to the Cow last night. The purpose of these runs is to explore a given system (the logistic growth model in this case) using different implementations of the stochastic simulation algorithm (aka … Continue reading → [Read more...]

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I just submitted the first release of the GillespieSSA package to CRAN. After much debating I finally decided to adhere to the unwritten R version numbering policy of starting really really low (and asymptotically approaching 1.0-0) . Thus, the first … Continue reading → [Read more...]

Yet another point John Chambers addressed in his key note speech (see previous post Programing as a higher craft) was the virtue of Open Source software. According to John there are two principles for programing (with R) Enable effective and … Continue reading → [Read more...]

In his keynote speech at the useR! meeting John Chambers of Statistics research at Bell Labs (one of the founders of the S System, which subsequently gave rise to the R project) asked the question what is programing? As it … Continue reading → [Read more...]

There were many presentations at the useR! meeting showing off amazing graphics that I had no idea R was capable of. It is clear to me that graphically speaking I have been living in the dark ages until now. One … Continue reading → [Read more...]

Here are a few things I overheard at the useR! meeting. These comments and quotes do not necessarily represent my opinions (although many do) and since many of them were overheard in informal discussions and rants I will not name … Continue reading → [Read more...]

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Sitting in a dreary hotel room in San Jose with Interstate 101 on my left and a burger joint/truck stop on my right (see previous post Report from the meeting of the Ecological Society of America in San Jose for … Continue reading → [Read more...]

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Just a brief update on my activities 11 days before the R package GillespieSSA is to be released. I have been hacking away on the code, debugging, and running test simulations like there is no tomorrow. The last SSA implementation … Continue reading → [Read more...]

Here’s my submitted abstract for the poster I will be presenting at the useR! 2007 meeting in August. GillespieSSA: A stochastic simulation package for R Mario Pineda-Krch Center for Animal Disease Modeling and Surveillance University of California, Davis Abstract Stochastic … Continue reading → [Read more...]

Finally took the leap and decided to go the ESA (Ecological Society of America) meeting despite it clashing with the useR! meeting. After checking out their smörgåsbord of a program there were simply too many yummy temptations, e.g. Alan Hastings … Continue reading → [Read more...]

Yesterday I decided that I will go the the useR! 2007 meeting after all. Initially I was a bit apprehensive, I was not sure if I had the time to spare and I like to present something when I go … Continue reading → [Read more...]

For a long time I have been puzzled by the apparent lack of a comprehensive Open Source computer algebra software, i.e. what Octave is to MatLab and what R is to S. In other words, where is the Open Source … Continue reading → [Read more...]