我试图从
Java中的多维数组获取arrf扩展输出文件.我导入了weka库,但是我收到了错误;类型FastVector< E>已弃用.
我可以使用什么代替FastVector以及如何重写下面的代码？
import weka.core.FastVector; //Error: The type FastVector<E> is deprecated.
int [][] myArray = new int[45194][12541];
for (int i = 0; i < myArray.length; i++) {
for (int j = 0; j < myArray[0].length; j++) {
System.out.print(myArray[i][j]+" ");
}
System.out.println("");
}
int numAtts = myArray[0].length;
FastVector atts = new FastVector(numAtts);
for (int att = 0; att < numAtts; att++) {
atts.addElement(new Attribute("Attribute" + att,att));
}
int numInstances = myArray.length;
Instances dataset = new Instances("Dataset",atts,numInstances);
for (int inst = 0; inst < numInstances; inst++) {
dataset.add(new Instance(1.0,myArray[inst])); //Error: Cannot instantiate the type Instance
}
BufferedWriter writer = new BufferedWriter(new FileWriter("test.arff"));
writer.write(dataset.toString());
writer.flush();
writer.close();
解决方法
Weka现在大多数地方使用类型化ArrayLists.您可以使用ArrayList< Attribute>为了这：
ArrayList<Attribute> atts = new ArrayList<Attribute>();
for (int att = 0; att < numAtts; att++) {
atts.add(new Attribute("Attribute" + att,att));
}
