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);
}
}
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