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2010-06-01T06:52:13Z

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в 18:01, 31 мая 2010

2010-05-31T18:01:45Z

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== JCharts: Scatter Plot ==

== JFreeChart: Fast Scatter Plot Demo ==



<source lang="java">

/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jfreechart/index.html
*
* This library is free software; you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Foundation;
* either version 2.1 of the License, or (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ------------------------
* FastScatterPlotDemo.java
* ------------------------
* (C) Copyright 2002-2004, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* $Id: FastScatterPlotDemo.java,v 1.13 2004/04/26 19:11:54 taqua Exp $
*
* Changes (from 29-Oct-2002)
* --------------------------
* 29-Oct-2002 : Added standard header and Javadocs (DG);
* 12-Nov-2003 : Enabled zooming (DG);
*
*/
package org.jfree.chart.demo;
import java.awt.RenderingHints;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.FastScatterPlot;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
/**
* A demo of the fast scatter plot.
*
*/
public class FastScatterPlotDemo extends ApplicationFrame {
/** A constant for the number of items in the sample dataset. */
private static final int COUNT = 500000;
/** The data. */
private float[][] data = new float[2][COUNT];
/**
* Creates a new fast scatter plot demo.
*
* @param title the frame title.
*/
public FastScatterPlotDemo(final String title) {
super(title);
populateData();
final NumberAxis domainAxis = new NumberAxis("X");
domainAxis.setAutoRangeIncludesZero(false);
final NumberAxis rangeAxis = new NumberAxis("Y");
rangeAxis.setAutoRangeIncludesZero(false);
final FastScatterPlot plot = new FastScatterPlot(this.data, domainAxis, rangeAxis);
final JFreeChart chart = new JFreeChart("Fast Scatter Plot", plot);
// chart.setLegend(null);
// force aliasing of the rendered content..
chart.getRenderingHints().put
(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
final ChartPanel panel = new ChartPanel(chart, true);
panel.setPreferredSize(new java.awt.Dimension(500, 270));
// panel.setHorizontalZoom(true);
// panel.setVerticalZoom(true);
panel.setMinimumDrawHeight(10);
panel.setMaximumDrawHeight(2000);
panel.setMinimumDrawWidth(20);
panel.setMaximumDrawWidth(2000);

setContentPane(panel);
}
// ****************************************************************************
// * JFREECHART DEVELOPER GUIDE *
// * The JFreeChart Developer Guide, written by David Gilbert, is available *
// * to purchase from Object Refinery Limited: *
// * *
// * http://www.object-refinery.ru/jfreechart/guide.html *
// * *
// * Sales are used to provide funding for the JFreeChart project - please *
// * support us so that we can continue developing free software. *
// ****************************************************************************

/**
* Populates the data array with random values.
*/
private void populateData() {
for (int i = 0; i < this.data[0].length; i++) {
final float x = (float) i + 100000;
this.data[0][i] = x;
this.data[1][i] = 100000 + (float) Math.random() * COUNT;
}
}
/**
* Starting point for the demonstration application.
*
* @param args ignored.
*/
public static void main(final String[] args) {
final FastScatterPlotDemo demo = new FastScatterPlotDemo("Fast Scatter Plot Demo");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);
}
}

</source>

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Admin: 1 версия

в 18:01, 31 мая 2010