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Arxiv New Filter | Bookmarks & clubs | Arxiv ref/author:

sampling method for PlanckTP + Planck SZ(SZ_plus_CMB.ini)
 
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Zhen Pan



Joined: 29 Aug 2017
Posts: 12
Affiliation: UC Davis

PostPosted: September 21 2017  Reply with quote

I am testing
Code:
sampling_method = 7

and run
mpirun -np 6 ./cosmomc xx.ini
but it seems to be a bad choice: the chains only move 1−3 steps in the first 30 mins.

Anyone knows which sampling method to use here ?
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Antony Lewis



Joined: 23 Sep 2004
Posts: 1291
Affiliation: University of Sussex

PostPosted: September 21 2017  Reply with quote

You can use method 1 to use standard Metropolis Hastings.

Also check your parameter propose widths: make sure they are small enough so that chain can move. (the SZ likelihood may also be slow, I'm not sure, I've not written or used it myself).
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Zhen Pan



Joined: 29 Aug 2017
Posts: 12
Affiliation: UC Davis

PostPosted: September 21 2017  Reply with quote

Thank you, Antony. I am using method=1 now.
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