graph_laplacian.cc 4.75 KB
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// graph-tool -- a general graph modification and manipulation thingy
//
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// Copyright (C) 2006-2020 Tiago de Paula Peixoto <tiago@skewed.de>
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//
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// This program is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License as published by the Free
// Software Foundation; either version 3 of the License, or (at your option) any
// later version.
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//
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// 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 Lesser General Public License for more
// details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.

#include <boost/python.hpp>
#include "graph.hh"
#include "graph_filtering.hh"
#include "graph_util.hh"
#include "numpy_bind.hh"

#include "graph_selectors.hh"
#include "graph_properties.hh"

#include "graph_laplacian.hh"

using namespace std;
using namespace boost;
using namespace graph_tool;

void laplacian(GraphInterface& g, boost::any index, boost::any weight,
               string sdeg,
               python::object odata, python::object oi,
               python::object oj)
{
    if (!belongs<vertex_scalar_properties>()(index))
        throw ValueException("index vertex property must have a scalar value type");

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    typedef UnityPropertyMap<double, GraphInterface::edge_t> weight_map_t;
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    typedef mpl::push_back<edge_scalar_properties, weight_map_t>::type
        weight_props_t;

    if (!weight.empty() && !belongs<edge_scalar_properties>()(weight))
        throw ValueException("weight edge property must have a scalar value type");

    if(weight.empty())
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        weight = weight_map_t();
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    deg_t deg;
    if (sdeg == "in")
        deg = IN_DEG;
    if (sdeg == "out")
        deg = OUT_DEG;
    if (sdeg == "total")
        deg = TOTAL_DEG;

    multi_array_ref<double,1> data = get_array<double,1>(odata);
    multi_array_ref<int32_t,1> i = get_array<int32_t,1>(oi);
    multi_array_ref<int32_t,1> j = get_array<int32_t,1>(oj);
    run_action<>()
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        (g,
         [&](auto&& graph, auto&& a2, auto&& a3)
         {
             return get_laplacian()
                 (std::forward<decltype(graph)>(graph),
                  std::forward<decltype(a2)>(a2),
                  std::forward<decltype(a3)>(a3), deg, data, i, j);
         },
         vertex_scalar_properties(), weight_props_t())(index, weight);
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}
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void laplacian_matvec(GraphInterface& g, boost::any index, boost::any weight,
                      boost::any deg, python::object ov, python::object oret)
{
    if (!belongs<vertex_scalar_properties>()(index))
        throw ValueException("index vertex property must have a scalar value type");

    typedef UnityPropertyMap<double, GraphInterface::edge_t> weight_map_t;
    typedef mpl::push_back<edge_scalar_properties, weight_map_t>::type
        weight_props_t;

    if (!weight.empty() && !belongs<edge_scalar_properties>()(weight))
        throw ValueException("weight edge property must have a scalar value type");

    if(weight.empty())
        weight = weight_map_t();

    multi_array_ref<double,1> v = get_array<double,1>(ov);
    multi_array_ref<double,1> ret = get_array<double,1>(oret);

    typedef typename vprop_map_t<double>::type deg_t;
    deg_t::unchecked_t d = any_cast<deg_t>(deg).get_unchecked();

    run_action<>()
        (g,
         [&](auto&& graph, auto&& vi, auto&& w)
         {
             return lap_matvec(graph, vi, w, d, v, ret);
         },
         vertex_scalar_properties(), weight_props_t())(index, weight);
}

void laplacian_matmat(GraphInterface& g, boost::any index, boost::any weight,
                      boost::any deg, python::object ov, python::object oret)
{
    if (!belongs<vertex_scalar_properties>()(index))
        throw ValueException("index vertex property must have a scalar value type");

    typedef UnityPropertyMap<double, GraphInterface::edge_t> weight_map_t;
    typedef mpl::push_back<edge_scalar_properties, weight_map_t>::type
        weight_props_t;

    if (!weight.empty() && !belongs<edge_scalar_properties>()(weight))
        throw ValueException("weight edge property must have a scalar value type");

    if(weight.empty())
        weight = weight_map_t();

    typedef typename vprop_map_t<double>::type deg_t;
    deg_t::unchecked_t d = any_cast<deg_t>(deg).get_unchecked();

    multi_array_ref<double,2> v = get_array<double,2>(ov);
    multi_array_ref<double,2> ret = get_array<double,2>(oret);

    run_action<>()
        (g,
         [&](auto&& graph, auto&& vi, auto&& w)
         {
             return lap_matmat(graph, vi, w, d, v, ret);
         },
         vertex_scalar_properties(), weight_props_t())(index, weight);
}