CosmoMC: Importance sampling
Posted: August 29 2005
Dear all:
I have set action = 0 and indep_sample = 3 (is it reasonable?)in the params.ini and generated the .data and .txt chain files using WMAP and SN data. Now I want to add SDSS data to tighten the constraints. What I did is set action =1 and
redo_likelihoods = T
redo_theory = T
redo_cls = T
redo_pk = T
redo_skip = 0
redo_outroot = blah
redo_thin = 1
#If large difference in log likelihoods may need to offset to give sensible weights
#for exp(difference in likelihoods)
redo_likeoffset = 0
I am puzzled when I check the output .txt file. The first column (weights) is of order 10^-7 or smaller . It is buggy when I getdist . Did I make any mistakes ? Thanks in advance.
ps. I have attempted to set redo_likeoffset = 10 but the resulted "weight" in .txt is still weird.
Cheers,
Gongbo Zhao
I have set action = 0 and indep_sample = 3 (is it reasonable?)in the params.ini and generated the .data and .txt chain files using WMAP and SN data. Now I want to add SDSS data to tighten the constraints. What I did is set action =1 and
redo_likelihoods = T
redo_theory = T
redo_cls = T
redo_pk = T
redo_skip = 0
redo_outroot = blah
redo_thin = 1
#If large difference in log likelihoods may need to offset to give sensible weights
#for exp(difference in likelihoods)
redo_likeoffset = 0
I am puzzled when I check the output .txt file. The first column (weights) is of order 10^-7 or smaller . It is buggy when I getdist . Did I make any mistakes ? Thanks in advance.
ps. I have attempted to set redo_likeoffset = 10 but the resulted "weight" in .txt is still weird.
Cheers,
Gongbo Zhao