petsc-3.14.6 2021-03-30

MatGetRowMinAbs

Gets the minimum value (in absolute value) of each row of the matrix

#include "petscmat.h" 
PetscErrorCode MatGetRowMinAbs(Mat mat,Vec v,PetscInt idx[])

Logically Collective on Mat

mat

- the matrix

	v	- the vector for storing the minimums
	idx	- the indices of the column found for each row (or NULL if not needed)

if a row is completely empty or has only 0.0 values then the idx[] value for that row is 0 (the first column).

This code is only implemented for a couple of matrix formats.

intermediate