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- ERROR While using WEKA API in java code: Class Attribute Not Set?
- Trying to add database driver (JDBC): RmiJdbc.RJDriver - Error, not in CLASSPATH?
- Trying to add database driver (JDBC): jdbc.idbDriver - Error, not in CLASSPATH?
- Trying to add database driver (JDBC): com.mckoi.JDBCDriver - Error, not in CLASSPATH?
- Trying to add database driver (JDBC): org.hsqldb.jdbcDriver - Error, not in CLASSPATH?
- weka.core.UnassignedClassException: weka.classifiers.trees.j48.C45PruneableClassifierTree: Class attribute not set!
- at weka.core.Capabilities.test(Capabilities.java:1086)
- at weka.core.Capabilities.test(Capabilities.java:1018)
- at weka.core.Capabilities.testWithFail(Capabilities.java:1297)
- .....
- try{
- DatabaseLoader loader = new DatabaseLoader();
- loader.setSource("jdbc:mysql://localhost:3306/cuaca","root","491754");
- loader.setQuery("select * from data_training");
- Instances data = loader.getDataSet();
- jTextArea1.append(data.toString());
- String[] options = new String[1];
- options[0] = "U"; // unpruned tree
- J48 tree = new J48(); // new instance of tree
- tree.setOptions(options); // set the option
- tree.buildClassifier(data); // build classifier
- //Evaluation eval=new Evaluation(data);
- //eval.crossValidateModel(tree, data, 10, new Random(1));
- //jTextArea1.append(eval.toSummaryString("n HASILNYA n", false));
- }catch(IOException ioe){ioe.printStackTrace();}
- catch(Exception e){e.printStackTrace();}
- @relation data_training
- @attribute Tmean numeric
- @attribute Tmax numeric
- @attribute Td numeric
- @attribute RH numeric
- @attribute SLP numeric
- @attribute STP numeric
- @attribute Wind_ave numeric
- @attribute Wind_max numeric
- @attribute Hujan {Y,T}
- @data
- 25.9,31.6,23.1,93.4,1008.5,998.2,2.6,12.9,Y
- 27.6,31.4,22.3,87,1009.6,999.3,0.8,3.1,T
- 27.4,32.6,21.9,86.1,1009.4,999.2,4.5,14.3,T
- 27.6,32.2,22.4,87.3,1009.1,998.9,2.4,8.2,T
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