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 ...

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:...

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....

Someone asked me how to move a directory full of files from one place to another using R.  The easiest way I've found is as follows (where "oldpath" is the existing directory and "newpath" is the new directory):file.copy(list.files(oldpath),newpath)

I've been using an OceanOptics USB4000 spectrometer in research on biomass accumulation and climate in South Africa.This post presents a R function that will read in JCAMP files from the SpectraSuite software and output a vector of reflectance values.&...

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 ...

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 ...