Like Stats and Bestfit

Use of Healpix, camb, CLASS, cosmomc, compilers, etc.
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Nishanth Sasankan
Posts: 27
Joined: September 07 2016
Affiliation: university of notre dame

Like Stats and Bestfit

Post by Nishanth Sasankan » February 19 2018

Hi
I am using the GetDistGUI and plotting a variable that I introduced. Shouldn't the bestfit for the variable be where the likelihood is maximum? The reason I ask is because, when i click on the like stat from the data tab, it gives me a different value away from the peak of the likelihood function.

Any insight would be helpful.

Thanks
Nishanth

Antony Lewis
Posts: 1364
Joined: September 23 2004
Affiliation: University of Sussex
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Re: Like Stats and Bestfit

Post by Antony Lewis » February 19 2018

The best fit only coincides with the peak of the marginalized probability if the full distribution is Gaussian (or more generally symmetric).

Note likestats is not the best fit - it's the best-fit sample (in high dimensions typically some way from the best fit).

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