/*
Copyright 2008-2011 Gephi
Authors : Sebastien Heymann <seb@gephi.org>
Website : http://www.gephi.org
This file is part of Gephi.
Gephi is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
Gephi 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with Gephi. If not, see <http://www.gnu.org/licenses/>.
*/
package org.gephi.statistics.plugin;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.gephi.data.attributes.api.AttributeColumn;
import org.gephi.data.attributes.api.AttributeModel;
import org.gephi.data.attributes.api.AttributeOrigin;
import org.gephi.data.attributes.api.AttributeRow;
import org.gephi.data.attributes.api.AttributeTable;
import org.gephi.data.attributes.api.AttributeType;
import org.gephi.graph.api.Edge;
import org.gephi.graph.api.GraphModel;
import org.gephi.graph.api.HierarchicalGraph;
import org.gephi.graph.api.Node;
import org.gephi.statistics.spi.Statistics;
import org.gephi.utils.longtask.spi.LongTask;
import org.gephi.utils.progress.Progress;
import org.gephi.utils.progress.ProgressTicket;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
/**
*
* @author Sebastien Heymann
*/
public class WeightedDegree implements Statistics, LongTask {
public static final String WDEGREE = "weighted degree";
private boolean isCanceled;
private ProgressTicket progress;
private double avgWDegree;
private Map<Float, Integer> degreeDist;
public double getAverageDegree() {
return avgWDegree;
}
public void execute(GraphModel graphModel, AttributeModel attributeModel) {
HierarchicalGraph graph = graphModel.getHierarchicalGraphVisible();
execute(graph, attributeModel);
}
public void execute(HierarchicalGraph graph, AttributeModel attributeModel) {
isCanceled = false;
degreeDist = new HashMap<Float, Integer>();
AttributeTable nodeTable = attributeModel.getNodeTable();
AttributeColumn degCol = nodeTable.getColumn(WDEGREE);
if (degCol == null) {
degCol = nodeTable.addColumn(WDEGREE, "Weighted Degree", AttributeType.INT, AttributeOrigin.COMPUTED, 0);
}
graph.readLock();
Progress.start(progress, graph.getNodeCount());
int i = 0;
for (Node n : graph.getNodes()) {
AttributeRow row = (AttributeRow) n.getNodeData().getAttributes();
float totalWeight = 0;
for (Iterator it = graph.getEdgesAndMetaEdges(n).iterator(); it.hasNext();) {
Edge e = (Edge) it.next();
totalWeight += e.getWeight();
}
row.setValue(degCol, totalWeight);
avgWDegree += totalWeight;
if (!degreeDist.containsKey(totalWeight)) {
degreeDist.put(totalWeight, 0);
}
degreeDist.put(totalWeight, degreeDist.get(totalWeight) + 1);
if (isCanceled) {
break;
}
i++;
Progress.progress(progress, i);
}
avgWDegree /= graph.getNodeCount();
graph.readUnlockAll();
}
public String getReport() {
//Distribution series
XYSeries dSeries = ChartUtils.createXYSeries(degreeDist, "Degree Distribution");
XYSeriesCollection dataset = new XYSeriesCollection();
dataset.addSeries(dSeries);
JFreeChart chart = ChartFactory.createXYLineChart(
"Degree Distribution",
"Value",
"Count",
dataset,
PlotOrientation.VERTICAL,
true,
false,
false);
ChartUtils.decorateChart(chart);
ChartUtils.scaleChart(chart, dSeries, false);
String degreeImageFile = ChartUtils.renderChart(chart, "w-degree-distribution.png");
NumberFormat f = new DecimalFormat("#0.000");
String report = "<HTML> <BODY> <h1>Weighted Degree Report </h1> "
+ "<hr>"
+ "<br> <h2> Results: </h2>"
+ "Average Weighted Degree: " + f.format(avgWDegree)
+ "<br /><br />"+degreeImageFile
+ "</BODY></HTML>";
return report;
}
public boolean cancel() {
this.isCanceled = true;
return true;
}
public void setProgressTicket(ProgressTicket progressTicket) {
this.progress = progressTicket;
}
}