simpeg.optimization.ProjectedGNCG.modifySearchDirection#
- ProjectedGNCG.modifySearchDirection(p)[source]#
Changes the search direction based on some sort of linesearch or trust-region criteria.
- Parameters:
- p
numpy.ndarray
The current search direction.
- p
- Returns:
numpy.ndarray
The modified search direction.
Notes
By default, an Armijo backtracking linesearch is preformed with the following parameters:
maxIterLS, the maximum number of linesearch iterations
LSreduction, the expected reduction expected, default: 1e-4
LSshorten, how much the step is reduced, default: 0.5
If the linesearch is completed, and a descent direction is found, passLS is returned as True.
Else, a modifySearchDirectionBreak call is preformed.