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/* -*- mode: C -*- */
/*
IGraph library.
Copyright (C) 2010-2012 Gabor Csardi <csardi.gabor@gmail.com>
334 Harvard street, Cambridge, MA 02139 USA
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#ifndef IGRAPH_EIGEN_H
#define IGRAPH_EIGEN_H
#include "igraph_decls.h"
#include "igraph_arpack.h"
#include "igraph_error.h"
#include "igraph_lapack.h"
#include "igraph_sparsemat.h"
__BEGIN_DECLS
typedef enum { IGRAPH_EIGEN_AUTO = 0,
IGRAPH_EIGEN_LAPACK,
IGRAPH_EIGEN_ARPACK,
IGRAPH_EIGEN_COMP_AUTO,
IGRAPH_EIGEN_COMP_LAPACK,
IGRAPH_EIGEN_COMP_ARPACK
} igraph_eigen_algorithm_t;
typedef enum { IGRAPH_EIGEN_LM = 0,
IGRAPH_EIGEN_SM, /* 1 */
IGRAPH_EIGEN_LA, /* 2 */
IGRAPH_EIGEN_SA, /* 3 */
IGRAPH_EIGEN_BE, /* 4 */
IGRAPH_EIGEN_LR, /* 5 */
IGRAPH_EIGEN_SR, /* 6 */
IGRAPH_EIGEN_LI, /* 7 */
IGRAPH_EIGEN_SI, /* 8 */
IGRAPH_EIGEN_ALL, /* 9 */
IGRAPH_EIGEN_INTERVAL, /* 10 */
IGRAPH_EIGEN_SELECT
} /* 11 */
igraph_eigen_which_position_t;
typedef struct igraph_eigen_which_t {
igraph_eigen_which_position_t pos;
int howmany;
int il, iu;
igraph_real_t vl, vu;
int vestimate;
igraph_lapack_dgeevx_balance_t balance;
} igraph_eigen_which_t;
IGRAPH_EXPORT igraph_error_t igraph_eigen_matrix_symmetric(const igraph_matrix_t *A,
const igraph_sparsemat_t *sA,
igraph_arpack_function_t *fun, int n,
void *extra,
igraph_eigen_algorithm_t algorithm,
const igraph_eigen_which_t *which,
igraph_arpack_options_t *options,
igraph_arpack_storage_t *storage,
igraph_vector_t *values,
igraph_matrix_t *vectors);
IGRAPH_EXPORT igraph_error_t igraph_eigen_matrix(const igraph_matrix_t *A,
const igraph_sparsemat_t *sA,
igraph_arpack_function_t *fun, int n,
void *extra,
igraph_eigen_algorithm_t algorithm,
const igraph_eigen_which_t *which,
igraph_arpack_options_t *options,
igraph_arpack_storage_t *storage,
igraph_vector_complex_t *values,
igraph_matrix_complex_t *vectors);
IGRAPH_EXPORT igraph_error_t igraph_eigen_adjacency(const igraph_t *graph,
igraph_eigen_algorithm_t algorithm,
const igraph_eigen_which_t *which,
igraph_arpack_options_t *options,
igraph_arpack_storage_t *storage,
igraph_vector_t *values,
igraph_matrix_t *vectors,
igraph_vector_complex_t *cmplxvalues,
igraph_matrix_complex_t *cmplxvectors);
__END_DECLS
#endif
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