#include "petscmat.h" PetscErrorCode MatSetValues(Mat mat,PetscInt m,const PetscInt idxm,PetscInt n,const PetscInt idxn,const PetscScalar v,InsertMode addv)Not Collective
|mat||- the matrix|
|v||- a logically two-dimensional array of values|
|m, idxm||- the number of rows and their global indices|
|n, idxn||- the number of columns and their global indices|
|addv||- either ADD_VALUES or INSERT_VALUES, where ADD_VALUES adds values to any existing entries, and INSERT_VALUES replaces existing entries with new values|
By default the values, v, are row-oriented. See MatSetOption() for other options.
Calls to MatSetValues() with the INSERT_VALUES and ADD_VALUES options cannot be mixed without intervening calls to the assembly routines.
MatSetValues() uses 0-based row and column numbers in Fortran as well as in C.
Negative indices may be passed in idxm and idxn, these rows and columns are simply ignored. This allows easily inserting element stiffness matrices with homogeneous Dirchlet boundary conditions that you don't want represented in the matrix.
Developer Notes: This is labeled with C so does not automatically generate Fortran stubs and interfaces because it requires multiple Fortran interfaces depending on which arguments are scalar or arrays.
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages