/*
* Source code for Listing 16.1
*
*/
package mia.classifier.ch16.samples;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import org.apache.mahout.math.DenseVector;
import org.apache.mahout.math.Vector;
import org.apache.mahout.vectorizer.encoders.ConstantValueEncoder;
import org.apache.mahout.vectorizer.encoders.FeatureVectorEncoder;
public class CSVEncoderLine {
private static final int FIELDS = 10;
public static void main(String[] args) throws IOException {
FeatureVectorEncoder[] encoder = new FeatureVectorEncoder[FIELDS];
for (int i = 0; i < FIELDS; i++) {
encoder[i] = new ConstantValueEncoder("v" + i);
}
long t0 = System.currentTimeMillis();
Vector v = new DenseVector(1000);
BufferedReader in = new BufferedReader(new FileReader(args[1]));
String line = in.readLine();
while (line != null) {
v.assign(0);
Line x = new Line(line);
for (int i = 0; i < FIELDS; i++) {
encoder[i].addToVector((byte[]) null, x.getDouble(i), v);
}
line = in.readLine();
}
System.out.printf("\nElapsed time = %.3f s\n",
(System.currentTimeMillis() - t0) / 1000.0);
}
}