Surrogates

optiSLang allows you to extend the surrogates by using common script interfaces.

To use custom script surrogates, the scripts must fulfill the naming conventions *_surr.py or *_surrogate.py and must be placed in one of the following locations:

  • [installation path]/scripting/algorithmns

  • Directories specified by SC_AlternativeCADirectories configuration settings.

  • Directories specified by the environment variable OSL_ALT_CA_SEARCH_DIRS, separated by the native environment separator (; on Windows platforms or : on Linux platforms).

Custom script surrogates found in any of these locations are loaded when the application starts and are then selectable in the MOP node as external models on the Advanced Settings tab (under Models > External).

Optionally, the following file types with the same filename and in the same directory can be used as:

The following functions are required in the Python script:

  • DefaultCustomSettings(args)

  • GetCustomSettings(args)

  • CheckSettings(args)

  • InitializeSurrogate(args)

  • BuildOptimal(args)

  • BuildOptimalBoxCox(args)

  • Build(args)

  • CheckBeforeBuild(args)

  • CheckAfterBuild(args)

  • InitializeApproximate(args)

  • Approximate(args)

  • ApproximateCrossValidation(args)