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///////////////////////////////////////////////////////////////////////////////
// For information as to what this class does, see the Javadoc, below. //
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, //
// 2007, 2008, 2009, 2010, 2014, 2015, 2022 by Peter Spirtes, Richard //
// Scheines, Joseph Ramsey, and Clark Glymour. //
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation; either version 2 of the License, or //
// (at your option) any later version. //
// //
// This program is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program; if not, write to the Free Software //
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA //
///////////////////////////////////////////////////////////////////////////////
package edu.cmu.tetrad.data;
/**
* Makes a new data set in which cases in the given data set that have been assigned multiplicies other than n = 1 are
* copied out n times. This increases the number of rows in the data set.
*
* @author josephramsey
*/
public final class CaseExpander implements DataFilter {
private static DataSet expand(DataSet dataSet) {
int rows = 0;
for (int i = 0; i < dataSet.getNumRows(); i++) {
// int caseMultiplier = dataSet.getMultiplier(i);
// for (int k = 0; k < caseMultiplier; k++) {
++rows;
// }
}
DataSet newDataSet =
new BoxDataSet(new VerticalDoubleDataBox(rows, dataSet.getVariables().size()), dataSet.getVariables());
int cols = dataSet.getNumColumns();
int index = -1;
for (int i = 0; i < dataSet.getNumRows(); i++) {
// int caseMultiplier = dataSet.getMultiplier(i);
// for (int k = 0; k < caseMultiplier; k++) {
++index;
for (int j = 0; j < cols; j++) {
if (dataSet.getVariable(j) instanceof ContinuousVariable) {
newDataSet.setDouble(index, j, dataSet.getDouble(i, j));
} else if (dataSet.getVariable(j) instanceof DiscreteVariable) {
newDataSet.setInt(index, j, dataSet.getInt(i, j));
} else {
throw new IllegalStateException("Expecting either a " +
"continuous or a discrete variable.");
}
}
// }
}
return newDataSet;
}
/**
* Expands cases for the given dataset.
*/
public DataSet filter(DataSet dataSet) {
return CaseExpander.expand(dataSet);
}
}
