SVDSolve#

Solves the singular value problem.

Synopsis#

#include "slepcsvd.h" 
PetscErrorCode SVDSolve(SVD svd)

Collective

Input Parameter#

svd - singular value solver context obtained from SVDCreate()

Options Database Keys#

-svd_view - print information about the solver used
-svd_view_mat0 - view the first matrix (A)
-svd_view_mat1 - view the second matrix (B)
-svd_view_signature - view the signature matrix (omega)
-svd_view_vectors - view the computed singular vectors
-svd_view_values - view the computed singular values
-svd_converged_reason - print reason for convergence, and number of iterations
-svd_error_absolute - print absolute errors of each singular triplet
-svd_error_relative - print relative errors of each singular triplet
-svd_error_norm - print errors relative to the matrix norms of each singular triplet

Notes#

All the command-line options listed above admit an optional argument specifying the viewer type and options. For instance, use ‘-svd_view_mat0 binary:amatrix.bin’ to save the A matrix to a binary file, ‘-svd_view_values draw’ to draw the computed singular values graphically, or ‘-svd_error_relative :myerr.m:ascii_matlab’ to save the errors in a file that can be executed in Matlab.