new parameter in cosmomc with uniform prior

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Nishanth Sasankan
Posts: 27
Joined: September 07 2016
Affiliation: university of notre dame

new parameter in cosmomc with uniform prior

Post by Nishanth Sasankan » November 01 2017

Hi everyone,
I am very new to cosmomc and I am trying to add a new parameter with a uniform prior in cosmomc. I know how to add the new parameter but I am not sure how I can implement a uniform prior (top hat prior) for the new parameter. Is it sufficient to just give a center, max and min but no width or propose width value in the params_CMB_defaults.ini file?

Thanks
Nishanth

Antony Lewis
Posts: 1392
Joined: September 23 2004
Affiliation: University of Sussex
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Re: new parameter in cosmomc with uniform prior

Post by Antony Lewis » November 01 2017

Priors are flat by default, just give center, max and min AND a starting and proposal width (the latter two have no impact on the prior, just how big jumps the code makes in the parameter).

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