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Re: [Opal] Multi objective optimization

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  • From: Jochem Snuverink <jochem.snuverink AT>
  • To: Anastasiya Bershanska <nastya AT>, <opal AT>
  • Subject: Re: [Opal] Multi objective optimization
  • Date: Thu, 28 Jun 2018 10:59:22 +0200
  • Authentication-results: localhost; dmarc=skipped

Hi Anastasiya,

Is the calculation of your variable very complicated? If not you can calculate it perhaps in the input file directly? You have a few basic functions available in the EXPR part (sqrt, pow, exp, log, fabs, sin, etc., see that you can use on the stat file variables.

The general case is however not possible at the moment. If it is a meaningful variable, we can possibly add it to the .stat file.

Alternatively, you can try to use the SYSTEM command ( at the end of each run. This executes a system call, and if you do your calculation in a separate program and write it to file, you can read in this file again with "fromFile". This is untested, but I believe it should work.

hope this helps,

On 27/06/18 21:19, Anastasiya Bershanska wrote:

I have a questions on the optimizer. According to the documentation, EXPR in
OBJECTIVE and CONSTRAINT can be specified using a few built-in functions that
take data from .stat file and variables defined in the temple file. However,
I would like to be able to optimize with respect to a variable that I
calculate using .stat and/or .dat files (i.e. specify OBJECTIVE as a new
function of input files). Is it possible to specify an new function that
reads from output files within OPAL input temple file?

Thank you,

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