CG

Provides parameters to tune the conjugate gradient optimization [Edit on GitHub]

Subsections

LINE_SEARCH

Keywords

FLETCHER_REEVES
MAX_STEEP_STEPS
RESTART_LIMIT

Keyword descriptions

FLETCHER_REEVES

Type: logical
Default: F
Lone keyword: T
Usage: FLETCHER_REEVES

Description: Uses FLETCHER-REEVES instead of POLAK-RIBIERE when using Conjugate Gradients

[Edit on GitHub]

MAX_STEEP_STEPS

Type: integer
Default: 0
Usage: MAX_STEEP_STEPS {integer}

Description: Maximum number of steepest descent steps before starting the conjugate gradients optimization.

[Edit on GitHub]

RESTART_LIMIT

Type: real
Default: 9.00000000E-001
Usage: RESTART_LIMIT {real}

Description: Cosine of the angle between two consecutive searching directions. If the angle during a CG optimization is less than the one corresponding to to the RESTART_LIMIT the CG is reset and one step of steepest descent is performed.

[Edit on GitHub]