Java tutorial
/* * 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 <http://www.gnu.org/licenses/>. */ /* * AttributeSummaryPanel.java * Copyright (C) 1999-2012 University of Waikato, Hamilton, New Zealand * */ package weka.gui; import java.awt.BorderLayout; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import javax.swing.BorderFactory; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.ListSelectionModel; import javax.swing.SwingConstants; import javax.swing.SwingUtilities; import javax.swing.table.DefaultTableCellRenderer; import javax.swing.table.DefaultTableModel; import weka.core.Attribute; import weka.core.AttributeStats; import weka.core.Instances; import weka.core.Utils; /** * This panel displays summary statistics about an attribute: name, type * number/% of missing/unique values, number of distinct values. For numeric * attributes gives some other stats (mean/std dev), for nominal attributes * gives counts for each attribute value. * * @author Len Trigg (trigg@cs.waikato.ac.nz) * @version $Revision$ */ public class AttributeSummaryPanel extends JPanel { /** for serialization */ static final long serialVersionUID = -5434987925737735880L; /** Message shown when no instances have been loaded and no attribute set */ protected static final String NO_SOURCE = "None"; /** Displays the name of the relation */ protected JLabel m_AttributeNameLab = new JLabel(NO_SOURCE); /** Displays the weight of attribute */ protected JLabel m_AttributeWeightLab = new JLabel(NO_SOURCE); /** Displays the string "Weight:" */ protected JLabel m_WeightLab = new JLabel("Weight:", SwingConstants.RIGHT); /** Displays the type of attribute */ protected JLabel m_AttributeTypeLab = new JLabel(NO_SOURCE); /** Displays the number of missing values */ protected JLabel m_MissingLab = new JLabel(NO_SOURCE); /** Displays the number of unique values */ protected JLabel m_UniqueLab = new JLabel(NO_SOURCE); /** Displays the number of distinct values */ protected JLabel m_DistinctLab = new JLabel(NO_SOURCE); /** Displays other stats in a table */ protected JTable m_StatsTable = new JTable() { /** for serialization */ private static final long serialVersionUID = 7165142874670048578L; /** * returns always false, since it's just information for the user * * @param row the row * @param column the column * @return always false, i.e., the whole table is not editable */ @Override public boolean isCellEditable(int row, int column) { return false; } }; /** The instances we're playing with */ protected Instances m_Instances; /** Cached stats on the attributes we've summarized so far */ protected AttributeStats[] m_AttributeStats; /** Do all instances have the same weight */ protected boolean m_allEqualWeights = true; /** * Creates the instances panel with no initial instances. */ public AttributeSummaryPanel() { JPanel simple = new JPanel(); GridBagLayout gbL = new GridBagLayout(); simple.setLayout(gbL); JLabel lab = new JLabel("Name:", SwingConstants.RIGHT); lab.setBorder(BorderFactory.createEmptyBorder(0, 10, 0, 0)); GridBagConstraints gbC = new GridBagConstraints(); gbC.anchor = GridBagConstraints.EAST; gbC.fill = GridBagConstraints.HORIZONTAL; gbC.gridy = 0; gbC.gridx = 0; gbL.setConstraints(lab, gbC); simple.add(lab); gbC = new GridBagConstraints(); gbC.anchor = GridBagConstraints.WEST; gbC.fill = GridBagConstraints.HORIZONTAL; gbC.gridy = 0; gbC.gridx = 1; gbC.weightx = 100; gbC.gridwidth = 3; gbL.setConstraints(m_AttributeNameLab, gbC); simple.add(m_AttributeNameLab); m_AttributeNameLab.setBorder(BorderFactory.createEmptyBorder(0, 5, 0, 10)); m_WeightLab.setBorder(BorderFactory.createEmptyBorder(0, 10, 0, 0)); gbC = new GridBagConstraints(); gbC.anchor = GridBagConstraints.EAST; gbC.fill = GridBagConstraints.HORIZONTAL; gbC.gridy = 0; gbC.gridx = 2; gbL.setConstraints(m_WeightLab, gbC); simple.add(m_WeightLab); gbC = new GridBagConstraints(); gbC.anchor = GridBagConstraints.WEST; gbC.fill = GridBagConstraints.HORIZONTAL; gbC.gridy = 0; gbC.gridx = 3; gbC.weightx = 100; gbC.gridwidth = 3; gbL.setConstraints(m_AttributeWeightLab, gbC); simple.add(m_AttributeWeightLab); m_AttributeWeightLab.setBorder(BorderFactory.createEmptyBorder(0, 5, 0, 10)); lab = new JLabel("Type:", SwingConstants.RIGHT); lab.setBorder(BorderFactory.createEmptyBorder(0, 10, 0, 0)); gbC = new GridBagConstraints(); gbC.anchor = GridBagConstraints.EAST; gbC.fill = GridBagConstraints.HORIZONTAL; gbC.gridy = 0; gbC.gridx = 4; gbL.setConstraints(lab, gbC); simple.add(lab); gbC = new GridBagConstraints(); gbC.anchor = GridBagConstraints.WEST; gbC.fill = GridBagConstraints.HORIZONTAL; gbC.gridy = 0; gbC.gridx = 5; gbC.weightx = 100; gbL.setConstraints(m_AttributeTypeLab, gbC); simple.add(m_AttributeTypeLab); m_AttributeTypeLab.setBorder(BorderFactory.createEmptyBorder(0, 5, 0, 10)); // Put into a separate panel? lab = new JLabel("Missing:", SwingConstants.RIGHT); lab.setBorder(BorderFactory.createEmptyBorder(0, 10, 5, 0)); gbC = new GridBagConstraints(); gbC.anchor = GridBagConstraints.EAST; gbC.fill = GridBagConstraints.HORIZONTAL; gbC.gridy = 1; gbC.gridx = 0; gbL.setConstraints(lab, gbC); simple.add(lab); gbC = new GridBagConstraints(); gbC.anchor = GridBagConstraints.WEST; gbC.fill = GridBagConstraints.HORIZONTAL; gbC.gridy = 1; gbC.gridx = 1; gbC.weightx = 100; gbL.setConstraints(m_MissingLab, gbC); simple.add(m_MissingLab); m_MissingLab.setBorder(BorderFactory.createEmptyBorder(0, 5, 5, 10)); lab = new JLabel("Distinct:", SwingConstants.RIGHT); lab.setBorder(BorderFactory.createEmptyBorder(0, 10, 5, 0)); gbC = new GridBagConstraints(); gbC.anchor = GridBagConstraints.EAST; gbC.fill = GridBagConstraints.HORIZONTAL; gbC.gridy = 1; gbC.gridx = 2; gbL.setConstraints(lab, gbC); simple.add(lab); gbC = new GridBagConstraints(); gbC.anchor = GridBagConstraints.WEST; gbC.fill = GridBagConstraints.HORIZONTAL; gbC.gridy = 1; gbC.gridx = 3; gbC.weightx = 100; gbL.setConstraints(m_DistinctLab, gbC); simple.add(m_DistinctLab); m_DistinctLab.setBorder(BorderFactory.createEmptyBorder(0, 5, 5, 10)); lab = new JLabel("Unique:", SwingConstants.RIGHT); lab.setBorder(BorderFactory.createEmptyBorder(0, 10, 5, 0)); gbC = new GridBagConstraints(); gbC.anchor = GridBagConstraints.EAST; gbC.fill = GridBagConstraints.HORIZONTAL; gbC.gridy = 1; gbC.gridx = 4; gbL.setConstraints(lab, gbC); simple.add(lab); gbC = new GridBagConstraints(); gbC.anchor = GridBagConstraints.WEST; gbC.fill = GridBagConstraints.HORIZONTAL; gbC.gridy = 1; gbC.gridx = 5; gbC.weightx = 100; gbL.setConstraints(m_UniqueLab, gbC); simple.add(m_UniqueLab); m_UniqueLab.setBorder(BorderFactory.createEmptyBorder(0, 5, 5, 10)); setLayout(new BorderLayout()); add(simple, BorderLayout.NORTH); add(new JScrollPane(m_StatsTable), BorderLayout.CENTER); m_StatsTable.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION); } /** * Tells the panel to use a new set of instances. * * @param inst a set of Instances */ public void setInstances(Instances inst) { m_Instances = inst; m_AttributeStats = new AttributeStats[inst.numAttributes()]; m_AttributeNameLab.setText(NO_SOURCE); m_AttributeTypeLab.setText(NO_SOURCE); m_AttributeWeightLab.setText(NO_SOURCE); m_MissingLab.setText(NO_SOURCE); m_UniqueLab.setText(NO_SOURCE); m_DistinctLab.setText(NO_SOURCE); m_StatsTable.setModel(new DefaultTableModel()); m_allEqualWeights = true; if (m_Instances.numInstances() == 0) { return; } double w = m_Instances.instance(0).weight(); for (int i = 1; i < m_Instances.numInstances(); i++) { if (m_Instances.instance(i).weight() != w) { m_allEqualWeights = false; break; } } } /** * Sets the attribute that statistics will be displayed for. * * @param index the index of the attribute to display */ public void setAttribute(final int index) { setHeader(index); if (m_AttributeStats[index] == null) { Thread t = new Thread() { @Override public void run() { m_AttributeStats[index] = m_Instances.attributeStats(index); SwingUtilities.invokeLater(new Runnable() { @Override public void run() { setDerived(index); m_StatsTable.sizeColumnsToFit(-1); m_StatsTable.revalidate(); m_StatsTable.repaint(); } }); } }; t.setPriority(Thread.MIN_PRIORITY); t.start(); } else { setDerived(index); } } /** * Sets the gui elements for fields that are stored in the AttributeStats * structure. * * @param index the index of the attribute */ protected void setDerived(int index) { AttributeStats as = m_AttributeStats[index]; long percent = Math.round(100.0 * as.missingCount / as.totalCount); m_MissingLab.setText("" + as.missingCount + " (" + percent + "%)"); percent = Math.round(100.0 * as.uniqueCount / as.totalCount); m_UniqueLab.setText("" + as.uniqueCount + " (" + percent + "%)"); m_DistinctLab.setText("" + as.distinctCount); setTable(as, index); } /** * Creates a tablemodel for the attribute being displayed * * @param as the attribute statistics * @param index the index of the attribute */ protected void setTable(AttributeStats as, int index) { if (as.nominalCounts != null) { Attribute att = m_Instances.attribute(index); Object[] colNames = { "No.", "Label", "Count", "Weight" }; Object[][] data = new Object[as.nominalCounts.length][4]; for (int i = 0; i < as.nominalCounts.length; i++) { data[i][0] = new Integer(i + 1); data[i][1] = att.value(i); data[i][2] = new Integer(as.nominalCounts[i]); data[i][3] = new Double(Utils.doubleToString(as.nominalWeights[i], 3)); } m_StatsTable.setModel(new DefaultTableModel(data, colNames)); m_StatsTable.getColumnModel().getColumn(0).setMaxWidth(60); DefaultTableCellRenderer tempR = new DefaultTableCellRenderer(); tempR.setHorizontalAlignment(JLabel.RIGHT); m_StatsTable.getColumnModel().getColumn(0).setCellRenderer(tempR); } else if (as.numericStats != null) { Object[] colNames = { "Statistic", "Value" }; Object[][] data = new Object[4][2]; data[0][0] = "Minimum"; data[0][1] = Utils.doubleToString(as.numericStats.min, 3); data[1][0] = "Maximum"; data[1][1] = Utils.doubleToString(as.numericStats.max, 3); data[2][0] = "Mean" + ((!m_allEqualWeights) ? " (weighted)" : ""); data[2][1] = Utils.doubleToString(as.numericStats.mean, 3); data[3][0] = "StdDev" + ((!m_allEqualWeights) ? " (weighted)" : ""); data[3][1] = Utils.doubleToString(as.numericStats.stdDev, 3); m_StatsTable.setModel(new DefaultTableModel(data, colNames)); } else { m_StatsTable.setModel(new DefaultTableModel()); } m_StatsTable.getColumnModel().setColumnMargin(4); } /** * Sets the labels for fields we can determine just from the instance header. * * @param index the index of the attribute */ protected void setHeader(int index) { Attribute att = m_Instances.attribute(index); m_AttributeNameLab.setText(att.name()); switch (att.type()) { case Attribute.NOMINAL: m_AttributeTypeLab.setText("Nominal"); break; case Attribute.NUMERIC: m_AttributeTypeLab.setText("Numeric"); break; case Attribute.STRING: m_AttributeTypeLab.setText("String"); break; case Attribute.DATE: m_AttributeTypeLab.setText("Date"); break; case Attribute.RELATIONAL: m_AttributeTypeLab.setText("Relational"); break; default: m_AttributeTypeLab.setText("Unknown"); break; } if (att.weight() != 1.0) { m_AttributeWeightLab.setText(Utils.doubleToString(att.weight(), 3)); m_AttributeWeightLab.setVisible(true); m_WeightLab.setVisible(true); } else { m_AttributeWeightLab.setVisible(false); m_WeightLab.setVisible(false); } m_MissingLab.setText("..."); m_UniqueLab.setText("..."); m_DistinctLab.setText("..."); } /** * Tests out the attribute summary panel from the command line. * * @param args optional name of dataset to load */ public static void main(String[] args) { try { final javax.swing.JFrame jf = new javax.swing.JFrame("Attribute Panel"); jf.getContentPane().setLayout(new BorderLayout()); final AttributeSummaryPanel p = new AttributeSummaryPanel(); p.setBorder(BorderFactory.createTitledBorder("Attribute")); jf.getContentPane().add(p, BorderLayout.CENTER); final javax.swing.JComboBox j = new javax.swing.JComboBox(); j.setEnabled(false); j.addActionListener(new java.awt.event.ActionListener() { @Override public void actionPerformed(java.awt.event.ActionEvent e) { p.setAttribute(j.getSelectedIndex()); } }); jf.getContentPane().add(j, BorderLayout.NORTH); jf.addWindowListener(new java.awt.event.WindowAdapter() { @Override public void windowClosing(java.awt.event.WindowEvent e) { jf.dispose(); System.exit(0); } }); jf.pack(); jf.setVisible(true); if (args.length == 1) { java.io.Reader r = new java.io.BufferedReader(new java.io.FileReader(args[0])); Instances inst = new Instances(r); p.setInstances(inst); p.setAttribute(0); String[] names = new String[inst.numAttributes()]; for (int i = 0; i < names.length; i++) { names[i] = inst.attribute(i).name(); } j.setModel(new javax.swing.DefaultComboBoxModel(names)); j.setEnabled(true); } } catch (Exception ex) { ex.printStackTrace(); System.err.println(ex.getMessage()); } } }