/*
* Apache License
* Version 2.0, January 2004
* http://www.apache.org/licenses/
*
* Copyright 2013 Aurelian Tutuianu
* Copyright 2014 Aurelian Tutuianu
* Copyright 2015 Aurelian Tutuianu
* Copyright 2016 Aurelian Tutuianu
*
* Licensed 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 rapaio.data.filter.frame;
import rapaio.core.distributions.Distribution;
import rapaio.core.distributions.Normal;
import rapaio.data.Frame;
import rapaio.data.VRange;
/**
* Created by <a href="mailto:padreati@yahoo.com">Aurelian Tutuianu</a> at 12/10/14.
*/
public class FFJitter extends AbstractFF {
private static final long serialVersionUID = 33367007274996702L;
private final Distribution d;
public FFJitter(VRange vRange) {
this(0.1, vRange);
}
public FFJitter(double sd, VRange vRange) {
this(new Normal(0, sd), vRange);
}
public FFJitter(Distribution d, VRange vRange) {
super(vRange);
if (d == null) {
throw new IllegalArgumentException("distribution parameter cannot be empty");
}
this.d = d;
}
@Override
public FFJitter newInstance() {
return new FFJitter(d, vRange);
}
@Override
public void train(Frame df) {
parse(df);
checkRangeVars(1, df.varCount(), df);
}
@Override
public Frame apply(Frame df) {
for (int i = 0; i < df.rowCount(); i++) {
for (String varName : varNames) {
df.setValue(i, varName, df.value(i, varName) + d.sampleNext());
}
}
return df;
}
}