/* * 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; } }