MCMC problems

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MCMC problems

Postby Eurycea » Thu Aug 08, 2024 3:36 pm

I'm running the latest Mark 10.1 from Windows 11 Enterprise.

Problem 1: aborting without error message or results

While running standard robust-design models with MCMC, the MCMC process will abort with 0 kb files. I've watched it part of the way, and a number of iterations (at least 1000) are run on chain 1 before the window just closes. Some models I can get to complete, but others do not. My attempts are to model survival group by year (this worked) or full time (this did not work) using a hyperdistribution.

Problem 2: odd .csv file results for detection parameters.
For p, the mean values match what I am getting without MCMC, but the median and other percentiles are formatted as
' 0.6577915E-37
, for example. The logit link parameters are not bonkers, but the real estimates are. For example, here's a 95% CI for p session 89, time 3:
-0.2477196 0.0419403

Here's what is reported for the real estimate:
0.6486637E-44 0.5652921E-34

Also note that the logit link parameters are reported in a different order compared to the real ones. Not sure if this matters at all but thought I'd mention it. Here's parameters 119 through 121:

Logit:
119 p:session73.9:time3
120 p:session75.9:time3
121 p:session78.9:time3

Real:
119 p g1 s86.9 t1
120 p g1 s86.9 t2
121 p g1 s86.9 t3
Eurycea
 
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Re: MCMC problems

Postby gwhite » Thu Aug 08, 2024 5:42 pm

Have you downloaded the latest version, because I fixed a bug when sorting output that were all the same values six months or so ago.

Gary
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Posts: 340
Joined: Fri May 16, 2003 9:05 am

Re: MCMC problems

Postby Eurycea » Fri Aug 09, 2024 10:14 am

Gary, yeah I'm using the latest version.
Eurycea
 
Posts: 103
Joined: Thu Feb 25, 2010 11:21 am

Re: MCMC problems

Postby gwhite » Fri Aug 09, 2024 4:17 pm

This bug has been fixed.

Gary
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Posts: 340
Joined: Fri May 16, 2003 9:05 am


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