/**
* 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 org.apache.mahout.classifier.df.split;
import java.util.Locale;
/**
* Contains enough information to identify each split
*/
public final class Split {
private final int attr;
private final double ig;
private final double split;
public Split(int attr, double ig, double split) {
this.attr = attr;
this.ig = ig;
this.split = split;
}
public Split(int attr, double ig) {
this(attr, ig, Double.NaN);
}
/**
* @return attribute to split for
*/
public int getAttr() {
return attr;
}
/**
* @return Information Gain of the split
*/
public double getIg() {
return ig;
}
/**
* @return split value for NUMERICAL attributes
*/
public double getSplit() {
return split;
}
@Override
public String toString() {
return String.format(Locale.ENGLISH, "attr: %d, ig: %f, split: %f", attr, ig, split);
}
}