Wilkinson Microwave Anisotropy Probe
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March 2008: Patch to CosmoMC Getdist analysis program, used to process WMAP5-formatted chains. Modified by Mike Nolta and Joanna Dunkley.
CosmoMC, found at http://cosmologist.info/cosmomc/, "is a Fortran 90 Markov-Chain Monte-Carlo engine for exploring cosmological parameter space. The Getdist application analyzes .txt files, calculating statistics and output files for the requested 1D, 2D and 3D plots." [Quote from the CosmoMC web site.]
Download the latest (April 2008) version of CosmoMC. Make sure the tarball has the following md5sum:
Unpack CosmoMC and copy the 1col.patch file from this distribution into the cosmomc directory and then:
Compile cosmomc/getdist as per the normal instructions.
There is a problem with this build under the IRIX operating system; getdist fails with a "bad system call" error. This is under investigation.
The parameters you want to process should sit in directories with
chain number X=1,2,3...
You should modify the .ini file to show the file location, e.g.:
In the .ini file you can also modify the number of chains and the parameters in the chain. For more information please refer to the CosmoMC documentation.