Posts Tagged ‘ R ’

GillespieSSA poster

August 3, 2007
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GillespieSSA poster

Finished my poster for the useR! 2007 meeting. It is also posted on the GillespieSSA web page as part of the package documentation. Now, all I have to do is show it off in Ames next week…, oh, and I … Continue reading →

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Adaptive tau-leaping in SSA

July 26, 2007
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Adaptive tau-leaping in SSA

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 →

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Abstract for useR! 2007 poster

July 15, 2007
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Abstract for useR! 2007 poster

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 →

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Testing for missing values of numeric (double) vectors in R

July 13, 2007
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I just came across this bit of R trickiness when trying to improve the error messages for one of our packages. I tried adding a check at the C level for NA_REAL, but to no avail. The test failed even when I was certain that I was passing down a vector containing missing

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Testing for missing values of numeric (double) vectors in R

July 13, 2007
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I just came across this bit of R trickiness when trying to improve the error messages for one of our packages. I tried adding a check at the C level for NA_REAL, but to no avail. The test failed even when I was certain that I was passing down a vecto...

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ESA 2007 – San Jose here I come!

July 12, 2007
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ESA 2007 – San Jose here I come!

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 →

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useR! 2007 – Ames here I come!

July 6, 2007
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useR! 2007 – Ames here I come!

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 →

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Where is all the Open Source computer algebra software?

July 4, 2007
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Where is all the Open Source computer algebra software?

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 →

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Documentation and tutorial roundup

June 4, 2007
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Documentation and tutorial roundup

I recently lost my documentation folder (oops), so I had to go online and retrieve the documentation files and tutorials that I find indispensible for working. I decided I’d save myself and everyone else the trouble by posting the list here. All of the files are available in PDF format. All R manuals Scilab documentation.

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Yes, it can

August 2, 2006
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Joel on Software’s latest post is about having first class functions in your programming language. He shows how you can use functions as arguments to functions to reduce code duplication. IReducing code duplication is a nice way to motivate language features since the process of removing duplication almost always results in improved code.

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