petsc-3.13.6 2020-09-29
MatSetValue
Set a single entry into a matrix. Not collective
Synopsis
#include <petscmat.h>
PetscErrorCode MatSetValue(Mat m,PetscInt row,PetscInt col,PetscScalar value,InsertMode mode)
Input Parameters
| m | - the matrix
|
| row | - the row location of the entry
|
| col | - the column location of the entry
|
| value | - the value to insert
|
| mode | - either INSERT_VALUES or ADD_VALUES
|
Notes
For efficiency one should use MatSetValues() and set several or many
values simultaneously if possible.
See Also
MatSetValues(), MatSetValueLocal()
Level
beginner
Location
src/mat/../../include/petscmat.h
Examples
src/mat/tutorials/ex4.c.html
src/mat/tutorials/ex4f.F90.html
src/ksp/ksp/tutorials/ex4.c.html
src/ksp/ksp/tutorials/ex59.c.html
src/ksp/ksp/tutorials/ex73.c.html
src/ksp/ksp/tutorials/ex44f.F90.html
src/ksp/ksp/tutorials/ex61f.F90.html
src/snes/tutorials/ex48.c.html
src/snes/tutorials/ex47cu.cu.html
src/ts/tutorials/ex10.c.html
src/ts/tutorials/ex24.c.html
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages