MatLUFactorSymbolic

Performs symbolic LU factorization of matrix. Call this routine before calling MatLUFactorNumeric().

Synopsis

int MatLUFactorSymbolic(Mat mat,IS row,IS col,double f,Mat *fact)
Collective on Mat

Input Parameters

mat - the matrix
row, col - row and column permutations
f - expected fill as ratio of the original number of nonzeros, for example 3.0; choosing this parameter well can result in more efficient use of time and space. Run with the option -log_info to determine an optimal value to use

Output Parameter

fact -new matrix that has been symbolically factored

Notes

See the users manual for additional information about choosing the fill factor for better efficiency.

Most users should employ the simplified SLES interface for linear solvers instead of working directly with matrix algebra routines such as this. See, e.g., SLESCreate().

Keywords

matrix, factor, LU, symbolic, fill

See Also

MatLUFactor(), MatLUFactorNumeric(), MatCholeskyFactor()

Level:developer
Location:src/mat/interface/matrix.c
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