MatH2OpusSetSamplingMat

Set a matrix to be sampled from matrix-vector products on another matrix to construct a hierarchical matrix.

Synopsis

#include "petscmat.h"   
PetscErrorCode MatH2OpusSetSamplingMat(Mat A, Mat B, PetscInt bs, PetscReal tol)

Input Parameters

• A - the hierarchical matrix

• B - the matrix to be sampled

• bs - maximum number of samples to be taken concurrently

• tol - relative tolerance for construction

Notes

You need to call MatAssemblyBegin() and MatAssemblyEnd() to update the hierarchical matrix.

See Also

Matrices, Mat, MatCreate(), MATH2OPUS, MatCreateH2OpusFromMat(), MatCreateH2OpusFromKernel(), MatH2OpusCompress(), MatH2OpusOrthogonalize()

Level

intermediate

Location

src/mat/impls/h2opus/cuda/math2opus.cu

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