[igraph] : Closeness

[patricia]

I need to calculate the closeness to all the vertices of a graph, but when you run the method below, an error message is displayed:

<< Cygwin_exception :: open_stackdumpfile ... >>

U could kindly tell me what the cause of the error.

.h File

class TNetData { 

private:

igraph_t net;

MatrixXf date;

VectorXi classes;

float nSigma;

float nEpsilon;

int nK;

int NumberOfSamples;

int numberOfFeatures;

int numberOfClasses;

distanceName string;

Distances dist;

public:

TNetData (string filename);

TNetData ~ ();

void KNN (float sigma, int K);

void wKNN (float sigma, int K);

void eCut (sigma float, float epsilon);

void weCut (sigma float, float epsilon);

void Post1NN (float sigma);

PostSupervised void ();

SaveSimulation void (int yes);

SaveNetwork void ();

void MatrixOfWeights (float sigma);

SaveNetMeasures void (int yes);

void SetDistance (string distance);

igraph_t GetNetwork * ();

// * MatrixXf GetData ();

igraph_vector_t Closeness (igraph_t * net, int numVertices);

};

#endif / * NETDATA_H_ * /

Cpp file

igraph_vector_t TNetData :: Closeness (igraph_t * net, int numVertices) {

    igraph_vector_t result_Closeness;

    igraph_vector_t id_Vertices;

    igraph_vs_t vs;

    // Igraph_vit_t it;

    igraph_integer_t i, position, id;

    igraph_vector_init (& id_Vertices, numVertices);

    igraph_vector_null (& id_Vertices);

    igraph_vs_all (& vs);

    // Igraph_vit_create (net, vs, & it);

    igraph_closeness (net, & result_Closeness, vs, IGRAPH_ALL, 0.0);

    for (i = 0; i <igraph_vector_size (& id_Vertices); i ++) {

        position = igraph_vector_which_max (& result_Closeness);

        igraph_vector_set (& result_Closeness, position, 0.0);

        id = VAN (net, "index" position);

        igraph_vector_set (& id_Vertices, i, id);

    }

    igraph_vector_destroy (& result_Closeness);

    igraph_vs_destroy (& vs);

    // Igraph_vit_destroy (& it);

    return (id_Vertices);

}

igraph_t *TNetData::GetNetwork(){

return & net;

}

Main Program

id_Vertices = network-> Closeness (network-> GetNetwork (), numVertices);

Thank you