Weka使用过滤器

</pre><p>注：请使用Weka 3-7 API 并且根据实际情况修改数据获取路径  下载地址 http://www.cs.waikato.ac.nz/ml/weka/</p><p></p><pre name="code" class="java">import weka.attributeSelection.CfsSubsetEval;import weka.attributeSelection.GreedyStepwise;import weka.core.Instances;import weka.core.converters.ConverterUtils.DataSource;import weka.filters.Filter;import weka.filters.supervised.attribute.AttributeSelection;/** * 使用过滤器 */public class UseFilter {public static void main(String[] args) throws Exception {// 加载数据DataSource source = new DataSource("D:/Program Files/Weka-3-6/data/weather.numeric.arff");Instances data = source.getDataSet();// 设置类别属性索引if (data.classIndex() == -1)data.setClassIndex(data.numAttributes() - 1);    System.out.println("\n 使用过滤器");    AttributeSelection filter = new AttributeSelection();    CfsSubsetEval eval = new CfsSubsetEval();    GreedyStepwise search = new GreedyStepwise();    search.setSearchBackwards(true);    filter.setEvaluator(eval);    filter.setSearch(search);    filter.setInputFormat(data);    Instances newData = Filter.useFilter(data, filter);    System.out.println(newData);}}