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/*
igraph library.
Copyright (C) 2013-2025 The igraph development team <igraph@igraph.org>
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, see <https://www.gnu.org/licenses/>.
*/
#ifndef IGRAPH_EMBEDDING_H
#define IGRAPH_EMBEDDING_H
#include "igraph_decls.h"
#include "igraph_datatype.h"
#include "igraph_error.h"
#include "igraph_arpack.h"
#include "igraph_eigen.h"
IGRAPH_BEGIN_C_DECLS
IGRAPH_EXPORT igraph_error_t igraph_adjacency_spectral_embedding(const igraph_t *graph,
igraph_int_t no,
const igraph_vector_t *weights,
igraph_eigen_which_position_t which,
igraph_bool_t scaled,
igraph_matrix_t *X,
igraph_matrix_t *Y,
igraph_vector_t *D,
const igraph_vector_t *cvec,
igraph_arpack_options_t *options);
typedef enum {
IGRAPH_EMBEDDING_D_A = 0,
IGRAPH_EMBEDDING_I_DAD,
IGRAPH_EMBEDDING_DAD,
IGRAPH_EMBEDDING_OAP
} igraph_laplacian_spectral_embedding_type_t;
IGRAPH_EXPORT igraph_error_t igraph_laplacian_spectral_embedding(const igraph_t *graph,
igraph_int_t no,
const igraph_vector_t *weights,
igraph_eigen_which_position_t which,
igraph_laplacian_spectral_embedding_type_t type,
igraph_bool_t scaled,
igraph_matrix_t *X,
igraph_matrix_t *Y,
igraph_vector_t *D,
igraph_arpack_options_t *options);
IGRAPH_EXPORT igraph_error_t igraph_dim_select(const igraph_vector_t *sv, igraph_int_t *dim);
IGRAPH_END_C_DECLS
#endif
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