petsc-3.12.4 2020-02-04
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# MatFDColoringSetValues

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

### Synopsis

    PetscErrorCode  MatFDColoringSetValues(Mat J,MatFDColoring coloring,const PetscScalar *y)

Collective on J

### 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 AD code

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

### See Also

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