Function make_data_sparse

dlib/test/graph_labeler.cpp:112–191

        typename labels_type
        >
    void make_data_sparse(
        samples_type& samples,
        labels_type& labels
    )
    {
        //samples.clear();
        //labels.clear();

        std::vector<bool> label;
        graph_type g;
        typename graph_type::edge_type v;

    // ---------------------------
        g.set_number_of_nodes(4);
        label.resize(g.number_of_nodes());
        g.node(0).data[2] = 1; label[0] = true;
        g.node(1).data[2] = 1; label[1] = true;
        g.node(2).data[1] = 1; label[2] = false;
        g.node(3).data[1] = 1; label[3] = false;

        g.add_edge(0,1);
        g.add_edge(1,2);
        g.add_edge(2,3);
        g.add_edge(3,0);
        g.add_edge(3,1);

        v[0] = 1; v[1] = 1;
        edge(g,0,1) = v;
        edge(g,1,2) = v;
        edge(g,2,3) = v;
        edge(g,3,0) = v;
        samples.push_back(g);
        labels.push_back(label);
    // ---------------------------

        g.clear();
        g.set_number_of_nodes(5);
        label.resize(g.number_of_nodes());
        g.node(0).data[2] = 1; label[0] = true;
        g.node(1).data[0] = 0; label[1] = true;
        g.node(2).data[1] = 1; label[2] = false;
        g.node(3).data[0] = 0; label[3] = false;
                               label[4] = true;

        g.add_edge(0,1);
        g.add_edge(1,4);
        g.add_edge(1,2);
        g.add_edge(2,3);
        g.add_edge(3,0);

        edge(g,0,1)[0] = 1;
        edge(g,1,4)[0] = 1;
        edge(g,1,2)[1] = 1;
        edge(g,2,3)[0] = 1;
        edge(g,3,0)[1] = 1;
        samples.push_back(g);
        labels.push_back(label);
    // ---------------------------