PETSc version 3.15.5

KSPSetComputeInitialGuess

set routine to compute the initial guess of the linear system

#include "petscksp.h" 
#include "petscmat.h" 
PetscErrorCode KSPSetComputeInitialGuess(KSP ksp,PetscErrorCode (*func)(KSP,Vec,void*),void *ctx)

Logically Collective

	ksp	- the KSP context
	func	- function to compute the initial guess
	ctx	- optional context

 func(KSP ksp,Vec x,void *ctx)

	ksp	- the KSP context
	x	- solution vector
	ctx	- optional user-provided context

Notes: This should only be used in conjunction with KSPSetComputeRHS(), KSPSetComputeOperators(), otherwise call KSPSetInitialGuessNonzero() and set the initial guess values in the solution vector passed to KSPSolve().

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