petsc-3.7.3 2016-07-24
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# MatCreateLaplacian

Create the matrix Laplacian, with all values in the matrix less than the tolerance set to zero

### Synopsis

    #include <petscmat.h>
    PetscErrorCode MatCreateLaplacian(Mat A, PetscReal tol, PetscBool weighted, Mat *L)

### Input Parameters

| A | - The matrix
| tol | - The zero tolerance
| weighted | - Flag for using edge weights

### Output Parameters

L -The graph Laplacian matrix

### See Also

MatChop()

Level:intermediate
Location: src/mat/order/spectral.c
Index of all MatOrderings routines
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Index of all manual pages