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Tips and tricks

83 bytes added, 19:29, 17 September 2016
m
→‎Changing BLAS: Should not write as if all Linux workstations used apt-get
===Changing BLAS===
 
Many Octave functions are wrappers to optimized numerical libraries, notably BLAS and ATLAS. It is possible to achieve impressive performance gains by simply using a library tuned to your platform. One example is using OpenBLAS to replace the default BLAS implementation ([http://www.stat.cmu.edu/~nmv/2013/07/09/for-faster-r-use-openblas-instead-better-than-atlas-trivial-to-switch-to-on-ubuntu/ further details]).
On some Linuxdistributions, this just takes a few commands:. For instance, on Ubuntu, it usually suffices to run
sudo apt-get install libopenblas-base libatlas3gf-base
Then runfollowed by
sudo update-alternatives --config libblas.so.3
and select then selecting the openblas option.

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