edu.uci.jforestsx.eval.RMSE Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package edu.uci.jforestsx.eval;
import edu.uci.jforestsx.sample.Sample;
/**
* @author Yasser Ganjisaffar
*/
public class RMSE extends EvaluationMetric {
public RMSE() {
super(false);
}
@Override
public double measure(double[] predictions, Sample sample) {
double rmse = 0;
double diff;
for (int i = 0; i < sample.size; i++) {
diff = sample.targets[i] - predictions[i];
rmse += diff * diff;
}
rmse = Math.sqrt(rmse / sample.size);
return rmse;
}
}