contraction_factor

Amount by which step length is rescaled

Specification

  • Alias: None

  • Arguments: REAL

  • Default: 0.25

Description

For pattern search methods, contraction_factor specifies the amount by which step length is rescaled after unsuccesful iterates, must be strictly between 0 and 1.

For methods that can expand the step length, the expansion is 1/ contraction_factor