Java – fastvector type is not recommended
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Java
I tried to get an arrf extension output file from a multidimensional array in Java I imported the Weka library, but I received an error; Type fastvector < E > deprecated
What can I use instead of fastvector and how can I rewrite the following code?
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();
Solution
Weka now uses typed ArrayLists in most places You can use ArrayList < attribute > to this:
ArrayList<Attribute> atts = new ArrayList<Attribute>(); for (int att = 0; att < numAtts; att++) { atts.add(new Attribute("Attribute" + att,att)); }
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