petsc-3.11.4 2019-09-28

TaoComputeGradient

Computes the gradient of the objective function

#include "petsctao.h" 
PetscErrorCode TaoComputeGradient(Tao tao, Vec X, Vec G)

Collective on Tao

	tao	- the Tao context
	X	- input vector

G -gradient vector

	-tao_test_gradient	- compare the user provided gradient with one compute via finite differences to check for errors
	-tao_test_gradient_view	- display the user provided gradient, the finite difference gradient and the difference between them to help users detect the location of errors in the user provided gradient

TaoComputeGradient() is typically used within minimization implementations, so most users would not generally call this routine themselves.

advanced