point_selection

Enable greedy selection of well-spaced build points

Topics

surrogate_models

Specification

• Alias: None

• Arguments: None

• Default: no point selection

Description

The Dakota Gaussian Process model has a point_selection option (default off) that uses a greedy algorithm to select a well-spaced subset of points prior to the construction of the GP. In this case, the GP will only interpolate the selected subset. Typically, one should not need point selection in trust-region methods because a small number of points are used to develop a surrogate within each trust region. Point selection is most beneficial when constructing with a large number of points, typically more than order one hundred, though this depends on the number of variables and spacing of the sample points.