How implement Cobweb java weka API












0















While implementing Cobweb clustering via weka java API, how to select attributes based on which clustering is to be performed. I have tried following line of code:



public String clustering(Instances data) {
try {
Cobweb cw = new Cobweb();
cw.buildClusterer(data);

Instance current;
// while ((current = loader.getNextInstance(structure)) != null) {
// cw.updateClusterer(current);
// }

cw.updateFinished();

//Crear el objeto para la validacion del modelo con Clustering
ClusterEvaluation clusterEval = new ClusterEvaluation();

clusterEval.setClusterer(cw);

String resCluster = "<br><b><center>Resultados Cluster"
+ "</center><br>========<br>Modelo generado indica los "
+ "siguientes resultados:<br>========<br></b>";

resCluster = resCluster + ("<b>1. Agrupacion:</b> "
+ clusterEval.getNumClusters() + "<br>");

return resCluster;

} catch (Exception e) {
return "El error es" + e.getMessage();
}

}


but an error is generated and it says



weka.clusterers.Cobweb: Cannot handle any class attribute!



enter image description here










share|improve this question



























    0















    While implementing Cobweb clustering via weka java API, how to select attributes based on which clustering is to be performed. I have tried following line of code:



    public String clustering(Instances data) {
    try {
    Cobweb cw = new Cobweb();
    cw.buildClusterer(data);

    Instance current;
    // while ((current = loader.getNextInstance(structure)) != null) {
    // cw.updateClusterer(current);
    // }

    cw.updateFinished();

    //Crear el objeto para la validacion del modelo con Clustering
    ClusterEvaluation clusterEval = new ClusterEvaluation();

    clusterEval.setClusterer(cw);

    String resCluster = "<br><b><center>Resultados Cluster"
    + "</center><br>========<br>Modelo generado indica los "
    + "siguientes resultados:<br>========<br></b>";

    resCluster = resCluster + ("<b>1. Agrupacion:</b> "
    + clusterEval.getNumClusters() + "<br>");

    return resCluster;

    } catch (Exception e) {
    return "El error es" + e.getMessage();
    }

    }


    but an error is generated and it says



    weka.clusterers.Cobweb: Cannot handle any class attribute!



    enter image description here










    share|improve this question

























      0












      0








      0








      While implementing Cobweb clustering via weka java API, how to select attributes based on which clustering is to be performed. I have tried following line of code:



      public String clustering(Instances data) {
      try {
      Cobweb cw = new Cobweb();
      cw.buildClusterer(data);

      Instance current;
      // while ((current = loader.getNextInstance(structure)) != null) {
      // cw.updateClusterer(current);
      // }

      cw.updateFinished();

      //Crear el objeto para la validacion del modelo con Clustering
      ClusterEvaluation clusterEval = new ClusterEvaluation();

      clusterEval.setClusterer(cw);

      String resCluster = "<br><b><center>Resultados Cluster"
      + "</center><br>========<br>Modelo generado indica los "
      + "siguientes resultados:<br>========<br></b>";

      resCluster = resCluster + ("<b>1. Agrupacion:</b> "
      + clusterEval.getNumClusters() + "<br>");

      return resCluster;

      } catch (Exception e) {
      return "El error es" + e.getMessage();
      }

      }


      but an error is generated and it says



      weka.clusterers.Cobweb: Cannot handle any class attribute!



      enter image description here










      share|improve this question














      While implementing Cobweb clustering via weka java API, how to select attributes based on which clustering is to be performed. I have tried following line of code:



      public String clustering(Instances data) {
      try {
      Cobweb cw = new Cobweb();
      cw.buildClusterer(data);

      Instance current;
      // while ((current = loader.getNextInstance(structure)) != null) {
      // cw.updateClusterer(current);
      // }

      cw.updateFinished();

      //Crear el objeto para la validacion del modelo con Clustering
      ClusterEvaluation clusterEval = new ClusterEvaluation();

      clusterEval.setClusterer(cw);

      String resCluster = "<br><b><center>Resultados Cluster"
      + "</center><br>========<br>Modelo generado indica los "
      + "siguientes resultados:<br>========<br></b>";

      resCluster = resCluster + ("<b>1. Agrupacion:</b> "
      + clusterEval.getNumClusters() + "<br>");

      return resCluster;

      } catch (Exception e) {
      return "El error es" + e.getMessage();
      }

      }


      but an error is generated and it says



      weka.clusterers.Cobweb: Cannot handle any class attribute!



      enter image description here







      java api weka






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 14 '18 at 2:20









      Sebastian SalazarSebastian Salazar

      157




      157
























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