Sets MatColoring options from user parameters


#include "petscmat.h"  
PetscErrorCode MatColoringSetFromOptions(MatColoring mc)
Collective on MatColoring

Input Parameters

mc - MatColoring context

Options Database Keys

-mat_coloring_type - the type of coloring algorithm used
-mat_coloring_maxcolors - the maximum number of relevant colors, all nodes not in a color are in maxcolors+1
-mat_coloring_distance - compute a distance 1,2,... coloring.
-mat_coloring_view - print information about the coloring and the produced index sets
-snes_fd_color - instruct SNES to using coloring and then MatFDColoring to compute the Jacobians
-snes_fd_color_use_mat - instruct SNES to color the matrix directly instead of the DM from which the matrix comes (the default)

Level: beginner

See Also

MatColoring, MatColoringApply(), MatColoringSetDistance(), SNESComputeJacobianDefaultColor()