Articles by Adam M. Wilson

Speeding up R with Intel’s Math Kernel Library (MKL)

May 2, 2012 | 0 Comments

I did some comparisons of the generic BLAS with Intel's MKL (both sequential and parallel) on a Dell PowerEdge 610 server with dual hyperthreading 6-core 3.06GHz Xeon X5675 processors.  Here are the results from an R benchmarking script (Normal R ...
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Installing R’s maps package on Ubuntu

April 16, 2012 | 0 Comments

I recently ran into trouble trying to install the R maps package on Ubuntu 10.04.  Here's the error I was getting: ** arch - gcc -std=gnu99 -O3 -pipe  -g    Gmake.c   -o GmakeGmake.c: In function ‘get_lh’:Gmake.c:...
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Slow R graphics via SSH

March 30, 2012 | 0 Comments

I do most of my R work on a server via SSH.  Viewing graphics (i.e. plot()) can be excruciatingly slow through the SSH pipe, but it's easy to make it fast.  Simply run:        X11.options(type="Xlib")once in the R session....
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Shrinking R’s PDF output

June 17, 2010 | 0 Comments

R is great for graphics, but I've found that the PDF's R produces when drawing large plots can be extremely large. This is especially common when using spplot() to plot a large raster. I've made a 15 page PDF full of rasters that was hundreds of MB in ...
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MODIS processing with R, GDAL, and the NCO tools

June 3, 2010 | 0 Comments

I use MODIS data for analysis of vegetation dynamics around the world.  The native HDF file format provided by NASA is great for archiving the data (it's amazing how much information they include in each file), but unfortunately there aren't many ...
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