Abdelrahman Said
99 lines
3.9 KiB
C
99 lines
3.9 KiB
C
/*
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igraph library.
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Copyright (C) 2010-2025 The igraph development team <igraph@igraph.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef IGRAPH_EIGEN_H
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#define IGRAPH_EIGEN_H
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#include "igraph_decls.h"
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#include "igraph_datatype.h"
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#include "igraph_arpack.h"
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#include "igraph_error.h"
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#include "igraph_lapack.h"
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#include "igraph_sparsemat.h"
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IGRAPH_BEGIN_C_DECLS
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typedef enum {
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IGRAPH_EIGEN_AUTO = 0,
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IGRAPH_EIGEN_LAPACK,
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IGRAPH_EIGEN_ARPACK,
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IGRAPH_EIGEN_COMP_AUTO,
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IGRAPH_EIGEN_COMP_LAPACK,
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IGRAPH_EIGEN_COMP_ARPACK
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} igraph_eigen_algorithm_t;
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typedef enum {
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IGRAPH_EIGEN_LM = 0,
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IGRAPH_EIGEN_SM, /* 1 */
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IGRAPH_EIGEN_LA, /* 2 */
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IGRAPH_EIGEN_SA, /* 3 */
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IGRAPH_EIGEN_BE, /* 4 */
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IGRAPH_EIGEN_LR, /* 5 */
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IGRAPH_EIGEN_SR, /* 6 */
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IGRAPH_EIGEN_LI, /* 7 */
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IGRAPH_EIGEN_SI, /* 8 */
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IGRAPH_EIGEN_ALL, /* 9 */
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IGRAPH_EIGEN_INTERVAL, /* 10 */
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IGRAPH_EIGEN_SELECT /* 11 */
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} igraph_eigen_which_position_t;
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typedef struct igraph_eigen_which_t {
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igraph_eigen_which_position_t pos;
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int howmany;
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int il, iu;
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igraph_real_t vl, vu;
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int vestimate;
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igraph_lapack_dgeevx_balance_t balance;
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} igraph_eigen_which_t;
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IGRAPH_EXPORT igraph_error_t igraph_eigen_matrix_symmetric(const igraph_matrix_t *A,
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const igraph_sparsemat_t *sA,
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igraph_arpack_function_t *fun, int n,
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void *extra,
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igraph_eigen_algorithm_t algorithm,
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const igraph_eigen_which_t *which,
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igraph_arpack_options_t *options,
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igraph_arpack_storage_t *storage,
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igraph_vector_t *values,
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igraph_matrix_t *vectors);
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IGRAPH_EXPORT igraph_error_t igraph_eigen_matrix(const igraph_matrix_t *A,
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const igraph_sparsemat_t *sA,
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igraph_arpack_function_t *fun, int n,
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void *extra,
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igraph_eigen_algorithm_t algorithm,
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const igraph_eigen_which_t *which,
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igraph_arpack_options_t *options,
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igraph_arpack_storage_t *storage,
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igraph_vector_complex_t *values,
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igraph_matrix_complex_t *vectors);
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IGRAPH_EXPORT igraph_error_t igraph_eigen_adjacency(const igraph_t *graph,
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igraph_eigen_algorithm_t algorithm,
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const igraph_eigen_which_t *which,
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igraph_arpack_options_t *options,
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igraph_arpack_storage_t *storage,
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igraph_vector_t *values,
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igraph_matrix_t *vectors,
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igraph_vector_complex_t *cmplxvalues,
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igraph_matrix_complex_t *cmplxvectors);
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IGRAPH_END_C_DECLS
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#endif
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