The result_Closeness variable was never initialized. T.
> On 25 Apr 2015, at 10:47, patricia <[email protected]> wrote: > > 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 > _______________________________________________ > igraph-help mailing list > [email protected] > https://lists.nongnu.org/mailman/listinfo/igraph-help
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