petsc-3.5.1 2014-08-06
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SNESLineSearchSetLambda

Sets the linesearch steplength.

Synopsis

#include "petscsnes.h" 
PetscErrorCode  SNESLineSearchSetLambda(SNESLineSearch linesearch, PetscReal lambda)

Input Parameters

linesearch - linesearch context
lambda - The last steplength.

Notes

This routine is typically used within implementations of SNESLineSearchApply() to set the final steplength. This routine (and SNESLineSearchGetLambda()) were added in order to facilitate Quasi-Newton methods that use the previous steplength as an inner scaling parameter.

See Also

SNESLineSearchGetLambda()

Level:advanced
Location:
src/snes/linesearch/interface/linesearch.c
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages