Math Function Chart : Math Functions « Advanced Graphics « Java
Math Function Chart
import java.awt.*;
import java.applet.*;
import java.net.URL;
import graph.*;
/*************************************************************************
**
** Applet example1a
** Version 1.0 January 1996
**
**************************************************************************
** Copyright (C) 1996 Leigh Brookshaw
**
** 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.
**
** 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, write to the Free Software
** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
**************************************************************************
**
** This is a simple applet that demonstrates how to use the basic features
** of the Plotting Class library. The data is calculated locally by
** the applet
**
*************************************************************************/
public class example1a extends Applet {
Graph2D graph1;
Graph2D graph2;
DataSet data1;
DataSet data2;
Axis xaxis1;
Axis xaxis2;
Axis yaxis1;
Axis yaxis2;
double data[];
int np = 25;
URL markersURL;
Markers markers;
Panel panel;
Label title;
public void init() {
int i;
int j;
double data[] = new double[2*np];
/*
** Get the passed parameters
*/
String st = "TITLE";
String mfile = "marker.txt";
/*
** Create the Graph instance and modify the default behaviour
*/
graph1 = new Graph2D();
graph1.drawzero = false;
graph1.drawgrid = false;
graph1.borderRight = 0;
graph1.setDataBackground(new Color(255,230,200));
graph2 = new Graph2D();
graph2.drawzero = false;
graph2.drawgrid = false;
graph2.borderLeft = 0;
graph2.setDataBackground(new Color(230,230,230));
/*
** Build the title
*/
title = new Label(st, Label.CENTER);
title.setFont(new Font("TimesRoman",Font.PLAIN,20));
/*
** Load a file containing Marker definitions
*/
try {
markersURL = this.getClass().getResource(mfile);
markers = new Markers(markersURL);
/*
** Lets add our own marker to the marker list
*/
int x[] = new int[12];
int y[] = new int[12];
boolean d[] = new boolean[12];
x[0]=-2; y[0]= 4; d[0]=false;
x[1]= 2; y[1]= 4; d[1]=true;
x[2]= 0; y[2]= 4; d[2]=false;
x[3]= 0; y[3]=-4; d[3]=true;
x[4]=-2; y[4]=-4; d[4]=false;
x[5]= 2; y[5]=-4; d[5]=true;
x[6]=-4; y[6]= 0; d[6]=false;
x[7]= 4; y[7]= 0; d[7]=true;
x[8]=-4; y[8]= 2; d[8]=false;
x[9]=-4; y[9]=-2; d[9]=true;
x[10]=4; y[10]= 2; d[10]=false;
x[11]=4; y[11]=-2; d[11]=true;
markers.AddMarker(9,12,d,x,y);
} catch(Exception e) {
e.printStackTrace();
System.out.println("Failed to create Marker URL!");
}
graph1.setMarkers(markers);
graph2.setMarkers(markers);
panel = new Panel();
panel.setLayout( new GridLayout(0,2,0,0) );
panel.add(graph1);
panel.add(graph2);
this.setLayout( new BorderLayout() );
this.add("North", title);
this.add("Center", panel);
/*
** Calculate the first data Set.
*/
for(i=j=0; i<np; i++,j+=2) {
data[j] = j-np;
data[j+1] = 60000 * Math.pow( ((double)data[j]/(np-2) ), 2);
}
data1 = graph1.loadDataSet(data,np);
data1.linecolor = Color.red;
data1.linestyle = 1;
data1.marker = 9;
data1.markerscale = 1.0;
data1.markercolor = new Color(0,0,255);
data1.legend(150,75,"y=6x10{^4}x^2");
data1.legendColor(Color.black);
/*
** Calculate the Second data Set.
*/
for(i=j=0; i<np; i++,j+=2) {
data[j] = j-np;
data[j+1] = Math.pow( ((double)data[j]/(np-2) ), 3);
}
data2 = graph2.loadDataSet(data, np);
data2.linecolor = new Color(0,255,0);
data2.marker = 3;
data2.markercolor = new Color(100,100,255);
data2.legend(100,75,"y=x^3");
data2.legendColor(Color.black);
/*
** Attach data sets to the Xaxes
*/
xaxis1 = graph1.createAxis(Axis.BOTTOM);
xaxis1.attachDataSet(data1);
xaxis1.setTitleText("Xaxis Left");
xaxis1.setTitleFont(new Font("TimesRoman",Font.PLAIN,20));
xaxis1.setLabelFont(new Font("Helvetica",Font.PLAIN,15));
xaxis2 = graph2.createAxis(Axis.BOTTOM);
xaxis2.attachDataSet(data2);
xaxis2.setTitleText("Xaxis Right");
xaxis2.setTitleFont(new Font("TimesRoman",Font.PLAIN,20));
xaxis2.setLabelFont(new Font("Helvetica",Font.PLAIN,15));
/*
** Attach the first data set to the Left Axis
*/
yaxis1 = graph1.createAxis(Axis.LEFT);
yaxis1.attachDataSet(data1);
yaxis1.setTitleText("y=6x10{^4}x^2");
yaxis1.setTitleFont(new Font("TimesRoman",Font.PLAIN,20));
yaxis1.setLabelFont(new Font("Helvetica",Font.PLAIN,15));
yaxis1.setTitleColor( new Color(0,0,255) );
yaxis1.setTitleRotation(0);
/*
** Attach the second data set to the Right Axis
*/
yaxis2 = graph2.createAxis(Axis.RIGHT);
yaxis2.attachDataSet(data2);
yaxis2.setTitleText("y=x^3");
yaxis2.setTitleFont(new Font("TimesRoman",Font.PLAIN,20));
yaxis2.setLabelFont(new Font("Helvetica",Font.PLAIN,15));
yaxis2.setTitleColor(new Color(100,100,255) );
yaxis2.setTitleRotation(0);
}
public static void main(String[] a){
javax.swing.JFrame f = new javax.swing.JFrame();
Applet app = new example1a();
app.init();
f.getContentPane().add (app);
f.pack();
f.setSize (new Dimension (500, 500));
f.setVisible(true);
}
}
Graph-MathFunctionChart.zip( 190 k)
