petsc-3.12.5 2020-03-29

TaoSetResidualRoutine

Sets the residual evaluation routine for least-square applications

#include "petsctao.h" 
PetscErrorCode TaoSetResidualRoutine(Tao tao, Vec res, PetscErrorCode (*func)(Tao, Vec, Vec, void*),void *ctx)

Logically collective on Tao

	tao	- the Tao context
	func	- the residual evaluation routine
	ctx	- [optional] user-defined context for private data for the function evaluation routine (may be NULL)

     func (Tao tao, Vec x, Vec f, void *ctx);

	x	- input vector
	f	- function value vector
	ctx	- [optional] user-defined function context

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