Question

我是WEKA工具的新手。我可以结合分类和聚类吗？即首先对数据进行聚类，然后对聚类实例进行分类。对于这个要求，需要遵循的步骤是什么。

提前致谢。

Answer 1

是的，你可以。使用ClassificationViaClustering分类器（Class ClassificationViaClustering）非常简单。

Java伪代码的步骤：
1.创建SimpleKMeans聚类器

SimpleKMeans skm = new SimpleKMeans();
skm.setNumClusters(5); // in this example the clusterer uses 5 clusters

2。读取数据集并设置类索引

BufferedReader reader = new BufferedReader(new FileReader("[path].arff")); // replace [path] with your path to dataset
Instances data = new Instances(reader);
data.setClassIndex([your class index]); // if the first attribute is your class, then insert 0

3。创建分类器

ClassifierViaClustering cvc = new ClassificationViaClustering();
cvc.setClusterer(skm); // let your classifier use the SimpleKMeans clusterer
cvc.buildClassifier(data);

然后，当您想要对新实例进行分类时：

Instance instanceToClassify = new Instance(data.firstInstance());
instanceToClassify.setDataset(data); // the instance to be classified has to have access to the dataset
double class = cvc.classifyInstance(instanceToClassify); // classify instance based by the cluster it belongs to

weka能够通过聚类使用分类

1 个答案: