org.matsim.contrib.drt.analysis.DensityScatterPlots.java Source code

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Here is the source code for org.matsim.contrib.drt.analysis.DensityScatterPlots.java

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/* *********************************************************************** *
 * project: org.matsim.*
 * *********************************************************************** *
 *                                                                         *
 * copyright       : (C) 2018 by the members listed in the COPYING,        *
 *                   LICENSE and WARRANTY file.                            *
 * email           : info at matsim dot org                                *
 *                                                                         *
 * *********************************************************************** *
 *                                                                         *
 *   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.                                   *
 *   See also COPYING, LICENSE and WARRANTY file                           *
 *                                                                         *
 * *********************************************************************** */

package org.matsim.contrib.drt.analysis;

import java.awt.Color;
import java.awt.Shape;
import java.awt.geom.Ellipse2D;

import org.apache.commons.lang3.tuple.Pair;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;

/**
 * @author michalm
 */
public class DensityScatterPlots {
    private static final Shape CIRCLE = new Ellipse2D.Double(-3, -3, 6, 6);

    public static JFreeChart createPlot(String title, String xAxisLabel, String yAxisLabel, XYSeries series) {
        return createPlot(title, xAxisLabel, yAxisLabel, series, null);
    }

    public static JFreeChart createPlot(String title, String xAxisLabel, String yAxisLabel, XYSeries series,
            Pair<Double, Double> lineCoeffs) {
        XYSeriesCollection dataset = new XYSeriesCollection();
        dataset.addSeries(series);
        double maxValue = Math.max(series.getMaxX(), series.getMaxY());

        // y=x
        XYSeries lineXY = new XYSeries("y = x");
        lineXY.add(0, 0);
        lineXY.add(maxValue, maxValue);
        dataset.addSeries(lineXY);

        if (lineCoeffs != null) {
            // a*y+b=x
            double a = lineCoeffs.getLeft();
            double b = lineCoeffs.getRight();
            String namePrefix = a == 0 ? "" : (a + " * y + ");
            XYSeries lineABXY = new XYSeries(namePrefix + b + " = x");
            lineABXY.add(b, 0);
            if (a == 0) {
                lineABXY.add(b, maxValue);
            } else {
                lineABXY.add(maxValue, (maxValue - b) / a);
            }
            dataset.addSeries(lineABXY);
        }

        final JFreeChart chart = ChartFactory.createScatterPlot(title, xAxisLabel, yAxisLabel, dataset);
        XYPlot xyPlot = (XYPlot) chart.getPlot();

        XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) xyPlot.getRenderer(0);
        renderer.setSeriesPaint(0, new Color(255, 0, 0, 50));
        renderer.setSeriesShape(0, CIRCLE);
        renderer.setSeriesLinesVisible(0, false);
        renderer.setSeriesShapesVisible(0, true);
        renderer.setSeriesVisibleInLegend(0, false);

        for (int i = 1; i < dataset.getSeriesCount(); i++) {
            renderer.setSeriesPaint(i, new Color(0, 0, 0));
            renderer.setSeriesLinesVisible(i, true);
            renderer.setSeriesShapesVisible(i, false);
            renderer.setSeriesVisibleInLegend(i, false);
        }

        xyPlot.getDomainAxis().setUpperBound(maxValue);
        xyPlot.getRangeAxis().setUpperBound(maxValue);
        xyPlot.getDomainAxis().setLowerBound(0);
        xyPlot.getRangeAxis().setLowerBound(0);

        return chart;
    }
}