GetDist: mcsamples.py warning

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Dahee Lee
Posts: 15
Joined: April 16 2018
Affiliation: Kyungpook National University

GetDist: mcsamples.py warning

Post by Dahee Lee » December 31 2018

Hi.
When I use GetDist, I got this warning for my parameter V0.

[WARNING] [mcsamples.py:1149] auto bandwidth for V0 very small or failed (h=0.0003142188258111446,N_eff=7341.548063183055). Using fallback (h=0.0011550058718305806)

Result is here.
V0.png
V0.png (7.68 KiB) Viewed 50 times
What does that mean? And how can I solve this warning?

Sorry for my trivial questions.
Any help would be appreciated.

Antony Lewis
Posts: 1406
Joined: September 23 2004
Affiliation: University of Sussex
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Re: GetDist: mcsamples.py warning

Post by Antony Lewis » December 31 2018

It means the distribution is very spiky or not converged.
Have you set the parameter ranges for V0 correctly (e.g. thereby giving a fake spike across V0=0)?

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