search

zblz / naima

Derivation of non-thermal particle distributions through MCMC spectral fitting
http://naima.readthedocs.io
BSD 3-Clause "New" or "Revised" License
43 stars 54 forks source link

SED of AGN, the parameters #219

Closed LL-RL closed 2 years ago

LL-RL commented 2 years ago

Dear Dr. Victor Zabalza. When I use naima's MCMC method to fit the SED of AGN, the parameters always do not converge, i.e. last ensemble lnprob: avg: -inf, max: -inf. How can I solve this problem?

zblz commented 2 years ago

Hi LL-RL,

If the fitting is resulting in non finite lnprob values it is likely that you should restrict the ranges of the parameters during the fitting to stay within realistic ranges by using the prior functionality. See the relevant section in the docs for more information.

LL-RL commented 2 years ago

Hi ZBLZ, Thanks for your reply, I've actually limited the range of parameters I've fitted, but there is still lnprob: avg: -inf.

------------------ 原始邮件 ------------------ 发件人: "zblz/naima" @.>; 发送时间: 2022年5月18日(星期三) 上午6:30 @.>; 抄送: "陆林 @.**@.>; 主题: Re: [zblz/naima] SED of AGN, the parameters (Issue #219)

Hi LL-RL,

If the fitting is resulting in non finite lnprob values it is likely that you should restrict the ranges of the parameters during the fitting to stay within realistic ranges by using the prior functionality. See the relevant section in the docs for more information.

— Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.Message ID: @.***>