petsc-master 2016-10-25
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Sets options for the line search


#include "petscsnes.h" 
PetscErrorCode SNESLineSearchSetFromOptions(SNESLineSearch linesearch)

Input Parameters

linesearch -linesearch context

Options Database Keys

-snes_linesearch_type <type> - basic, bt, l2, cp, nleqerr, shell
-snes_linesearch_order <order> - 1, 2, 3. Most types only support certain orders (bt supports 2 or 3)
-snes_linesearch_norms - Turn on/off the linesearch norms for the basic linesearch type
-snes_linesearch_minlambda - The minimum step length
-snes_linesearch_maxstep - The maximum step size
-snes_linesearch_rtol - Relative tolerance for iterative line searches
-snes_linesearch_atol - Absolute tolerance for iterative line searches
-snes_linesearch_ltol - Change in lambda tolerance for iterative line searches
-snes_linesearch_max_it - The number of iterations for iterative line searches
-snes_linesearch_monitor [:filename] - Print progress of line searches
-snes_linesearch_monitor_solution_update [viewer:filename:format] - view each update tried by line search routine
-snes_linesearch_damping - The linesearch damping parameter
-snes_linesearch_keeplambda - Keep the previous search length as the initial guess.
-snes_linesearch_precheck_picard - Use precheck that speeds up convergence of picard method
-snes_linesearch_precheck_picard_angle - Angle used in picard precheck method

Logically Collective on SNESLineSearch

See Also

SNESLineSearchCreate(), SNESLineSearchSetOrder(), SNESLineSearchSetType(), SNESLineSearchSetTolerances(), SNESLineSearchSetDamping(), SNESLineSearchPreCheckPicard()

Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages