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convergence issue
 
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Nishanth Sasankan



Joined: 07 Sep 2016
Posts: 18
Affiliation: university of notre dame

PostPosted: January 03 2018  Reply with quote

Hi ,
I been running CosmoMC and R−1 was about 0.078 the next time it was updated R−1 was 0.059 the next time it was 0.045. Is it usual to see that the drops in R−1 slow down like this between updates. The reason I ask is because the first time it was about 15, then it became 7 and then it was 1.7.

Is it Possible that some chain is just taking its time while others have converged.

Thanks
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Antony Lewis



Joined: 23 Sep 2004
Posts: 1308
Affiliation: University of Sussex

PostPosted: January 04 2018  Reply with quote

You mean the values in the .log file? Doesn't sound too bad, won't converge so dramatically once the chains are all exploring the same area.
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