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[CosmoMC] - changed n_run convention?
 
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Ira *Wolfson



Joined: 24 Jan 2013
Posts: 63
Affiliation: BGU
PostPosted: August 05 2017  Reply with quote
Hi,

My old rig has fallen, so I just finished basically formatting everything and reinstalling CosmoMC (and all deps).

I have now run 3 separate runs with the different datasets.

Just as a reference:

Code:

#general settings
#Bicep-Keck-Planck, varying cosmological parameters
DEFAULT(batch2/BKPlanck.ini)

#Planck 2015, default just include native likelihoods (others require clik)
#DEFAULT(batch2/plik_dx11dr2_HM_v18_TT.ini)
DEFAULT(batch2/lowTEB.ini)
DEFAULT(batch2/lowl.ini)
DEFAULT(batch2/lensing.ini)

#Other Likelihoods
#DEFAULT(batch2/BAO.ini)
#DEFAULT(batch2/WiggleZ_MPK.ini)
#DEFAULT(batch2/MPK.ini)
#DEFAULT(batch2/WL.ini)

#general settings
DEFAULT(batch2/common.ini)

#e.g. to vary r in addition to standard 6:
#(for r>0 also need compute_tensors=T)
compute_tensors = T
param[r] = 0.06 0.0 0.5 0.04 0.04
param[logA] = 3.1 1.5 4.5 0.04 0.04
param[ns] = 0.96 0.9 1.05 0.04 0.04
param[nrun]=-0.09 -0.5 0.5 0.04 0.04
param[nrunrun]=0
param[tau]=0.07
#limits[r02]=0 N
limits[r]=0 N



I used different data sets - including BAO, Wigglez etc.

The results for nrun are always slightly positive, where in my previous experience, when nrun is used (and nrun,run is set to 0 ) , one usually gets a slightly negative value.

This is also the case with the most recent Planck collaboration analysis.

Has the convention for CosmoMC changed between the last stable version and the current master branch?

If not, any advise on what is happening?

Thanks

– Ira
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Antony Lewis



Joined: 23 Sep 2004
Posts: 1332
Affiliation: University of Sussex
PostPosted: August 06 2017  Reply with quote
As far as I know nothing has changed (could check by compare outputs for non-trivial initial nrun using action=4 for last stable versus master).
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