MatFDColoringSetValues — PETSc 3.25.4 documentation

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# MatFDColoringSetValues

takes a matrix in compressed color format and enters the matrix into a PETSc `Mat`

## Synopsis

    #include "petscmat.h"
    PetscErrorCode MatFDColoringSetValues(Mat J, MatFDColoring coloring, const PetscScalar y[])

Collective

## Input Parameters

- J - the sparse matrix

- coloring - created with `MatFDColoringCreate()` and a local coloring

- y - column major storage of matrix values with one color of values per column, the number of rows of `y` should match the number of local rows of `J` and the number of columns is the number of colors.

## Notes

The matrix in compressed color format may come from an automatic differentiation code

The code will be slightly faster if `MatFDColoringSetBlockSize`(coloring,`PETSC_DEFAULT`,nc); is called immediately after creating the coloring

## See Also

Matrices, `Mat`, `MatFDColoringCreate()`, `ISColoring`, `ISColoringCreate()`, `ISColoringSetType()`, `IS_COLORING_LOCAL`, `MatFDColoringSetBlockSize()`

## Level

intermediate

## Location

src/mat/impls/aij/mpi/fdmpiaij.c

Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages