[Mesa-users] Ending Simplex Run

Dennis Stello dennis.stello at sydney.edu.au
Mon Sep 26 02:00:25 UTC 2022

Hi Erica,

You can stop the simplex based on an absolute chi2 level 
'simplex_chi2_tol' or after a fixed number of simplex calls 
'simplex_itermax' but to my knowledge there is not a knob that does 
exactly what you are after. Instead simplex_a_atol' and rtol are doing 
something along those lines (but different...as described in your inlist)


On 24/09/2022 07:35, Erica A Sawczynec via Mesa-users wrote:
> Hi MESA Users,
>         I have an issue that I feel should be somewhat easy to solve, 
> but I just haven’t been able to figure out how to do it. I run simplex 
> models trying to match stellar oscillations and parameters, but I 
> struggle with ending the simplex run after a reasonable chi2 is 
> reached. Instead my runs often just terminate after they timeout on 
> the cluster they are running on (3 day limit) even when the chi2 value 
> is pretty much the same between the last 100 models. Is there a way to 
> terminate the simplex run if the difference between several subsequent 
> chi2 values is less than some value?
>         I’m using MESA version r12115 with the matching SDK. I’ve 
> attached an image that shows what I mean about the chi2 values looking 
> relatively the same for the last ~75 models in the simplex run and an 
> example inlist_astero_search_controls.
> Thanks for your help!
> Erica
> _______________________________________________
> mesa-users at lists.mesastar.org
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