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The Waikato Environment for Knowledge Analysis (WEKA), a machine
learning workbench. This is the stable version. Apart from bugfixes, this version
does not receive any other updates.
/*
* 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 3 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, see .
*/
/*
* NumericToNominal.java
* Copyright (C) 2006-2012 University of Waikato, Hamilton, New Zealand
*/
package weka.filters.unsupervised.attribute;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Vector;
import weka.core.Attribute;
import weka.core.Capabilities;
import weka.core.Capabilities.Capability;
import weka.core.DenseInstance;
import weka.core.Instance;
import weka.core.Instances;
import weka.core.Option;
import weka.core.Range;
import weka.core.RevisionUtils;
import weka.core.SparseInstance;
import weka.core.Utils;
import weka.filters.SimpleBatchFilter;
/**
* A filter for turning numeric attributes into
* nominal ones. Unlike discretization, it just takes all numeric values and
* adds them to the list of nominal values of that attribute. Useful after CSV
* imports, to enforce certain attributes to become nominal, e.g., the class
* attribute, containing values from 1 to 5.
*
*
*
* Valid options are:
*
*
*
* -R <col1,col2-col4,...>
* Specifies list of columns to Discretize. First and last are valid indexes.
* (default: first-last)
*
*
*
* -V
* Invert matching sense of column indexes.
*
*
*
*
* @author fracpete (fracpete at waikato dot ac dot nz)
* @version $Revision: 12037 $
*/
public class NumericToNominal extends SimpleBatchFilter {
/** for serialization */
private static final long serialVersionUID = -6614630932899796239L;
/** the maximum number of decimals to use */
protected final static int MAX_DECIMALS = 6;
/** Stores which columns to turn into nominals */
protected Range m_Cols = new Range("first-last");
/** The default columns to turn into nominals */
protected String m_DefaultCols = "first-last";
/**
* Returns a string describing this filter
*
* @return a description of the filter suitable for displaying in the
* explorer/experimenter gui
*/
@Override
public String globalInfo() {
return "A filter for turning numeric attributes into nominal ones. Unlike "
+ "discretization, it just takes all numeric values and adds them to "
+ "the list of nominal values of that attribute. Useful after CSV "
+ "imports, to enforce certain attributes to become nominal, e.g., "
+ "the class attribute, containing values from 1 to 5.";
}
/**
* Gets an enumeration describing the available options.
*
* @return an enumeration of all the available options.
*/
@Override
public Enumeration