have recently started using COSMOMC for carrying out parameter estimation and found it extremely useful and versatile. However, there are few things I am unable to understand and am facing some problems. Kindly give me some suggestions.

1) I would like to do a COSMOMC run with only the WMAP TT data excluding the TE data which as I understand means putting "num_cls" equal to 1. Accordingly I changed the value of "num_cls" (wherever it exists) but it gives an error "MCMC could not start after 1000 tries....." What is going wrong? Am I missing something!

2) I would also like to run COSMOMC but with a scale invariant power spectrum fixing the spectral index, ns (=1). I tried fixing the value in power_tilt.f90 as well as fixing ns parameter values to 1 in 'params.ini' but none of them worked.

3) I would like to change the CAMB part to use my own set of inflationary parameters so as I understand I have to replace the power_tilt.f90 routine with my own routine (primarily the scalar and tensor power parts of it). Which are the other files which need modifications. Also I would like to know where in the CAMB part do you fix (or you vary) the value of scalar to tensor power amplitude. I have read the FAQs and readme sections as well.

Kindly give inputs/suggestions. Thanks.

 

 

 

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I have knoew idea what you are talking about,

what is COSMOMC

 

 

 

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this program is four this: if you get the idea!


it is fourstar observacion end math planning of star moval

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