我相信您必须创建自己的实例。下面，我展示了如何从具有两个属性（纬度和经度）的数组创建新实例。
import weka.core.Attribute;import weka.core.DenseInstance;import weka.core.FastVector;import weka.core.Instances;public class AttTest { public static void main(String[] args) throws Exception { double[] one={0,1,2,3}; double[] two={3,2,1,0}; double[][] both=new double[2][4]; both[0]=one; both[1]=two; Instances to_use=AttTest.buildArff(both); System.out.println(to_use.toString()); } public static Instances buildArff(double[][] array) throws Exception { FastVector atts = new FastVector(); atts.addElement(new Attribute("lat")); //latitude atts.addElement(new Attribute("lon")); //longitude // 2. create Instances object Instances test = new Instances("location", atts, 0); // 3. fill with data for(int s1=0; s1 < array[0].length; s1=s1+1) { double vals[] = new double[test.numAttributes()]; vals[0] = array[0][s1]; vals[1] = array[1][s1]; test.add(new DenseInstance(1.0, vals)); } return(test); }}
