90 lines
3.2 KiB
Java
90 lines
3.2 KiB
Java
import java.awt.*;
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import java.awt.event.*;
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import java.awt.geom.*;
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import javax.swing.JApplet;
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import javax.swing.JFrame;
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public class Plot2d extends JApplet {
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double[] xi;
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double[] yi;
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public Plot2d(double[] x, double[] y) {
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this.xi = x;
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this.yi = y;
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}
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public static double max(double[] t) {
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double maximum = t[0];
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for (int i = 1; i < t.length; i++) {
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if (t[i] > maximum) {
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maximum = t[i];
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}
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}
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return maximum;
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}
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public static double min(double[] t) {
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double minimum = t[0];
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for (int i = 1; i < t.length; i++) {
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if (t[i] < minimum) {
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minimum = t[i];
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}
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}
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return minimum;
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}
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public void init() {
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setBackground(Color.white);
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setForeground(Color.white);
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}
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public void paint(Graphics g) {
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Graphics2D g2 = (Graphics2D) g;
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g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
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RenderingHints.VALUE_ANTIALIAS_ON);
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g2.setPaint(Color.black);
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int x0 = 70;
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int y0 = 10;
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int xm = 670;
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int ym = 410;
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int xspan = xm - x0;
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int yspan = ym - y0;
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double xmax = max(xi);
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double xmin = min(xi);
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double ymax = max(yi);
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double ymin = min(yi);
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g2.draw(new Line2D.Double(x0, ym, xm, ym));
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g2.draw(new Line2D.Double(x0, ym, x0, y0));
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for (int j = 0; j < 5; j++) {
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int interv = 4;
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g2.drawString("" + (j * (xmax - xmin) / interv + xmin), j * xspan / interv + x0 - 10, ym + 20);
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g2.drawString("" + (j * (ymax - ymin) / interv + ymin), x0 - 20 - (int) (9 * Math.log10(ymax)),
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ym - j * yspan / interv + y0 - 5);
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g2.draw(new Line2D.Double(j * xspan / interv + x0, ym, j * xspan / interv + x0, ym + 5));
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g2.draw(new Line2D.Double(x0 - 5, j * yspan / interv + y0, x0, j * yspan / interv + y0));
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}
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for (int i = 0; i < xi.length; i++) {
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int f = (int) ((xi[i] - xmin) * xspan / (xmax - xmin));
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int h = (int) (((ymax - ymin) - (yi[i] - ymin)) * yspan / (ymax - ymin));
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g2.drawString("o", x0 + f - 3, h + 14);
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}
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for (int i = 0; i < xi.length - 1; i++) {
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int f = (int) ((xi[i] - xmin) * xspan / (xmax - xmin));
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int f2 = (int) ((xi[i + 1] - xmin) * xspan / (xmax - xmin));
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int h = (int) (((ymax - ymin) - (yi[i] - ymin)) * yspan / (ymax - ymin));
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int h2 = (int) (((ymax - ymin) - (yi[i + 1] - ymin)) * yspan / (ymax - ymin));
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g2.draw(new Line2D.Double(f + x0, h + y0, f2 + x0, h2 + y0));
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}
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}
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public static void main(String args[]) {
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JFrame f = new JFrame("ShapesDemo2D");
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f.addWindowListener(new WindowAdapter() {
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public void windowClosing(WindowEvent e) {
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System.exit(0);
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}
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});
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double[] r = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
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double[] t = {2.7, 2.8, 31.4, 38.1, 58.0, 76.2, 100.5, 130.0, 149.3, 180.09};
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JApplet applet = new Plot2d(r, t);
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f.getContentPane().add("Center", applet);
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applet.init();
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f.pack();
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f.setSize(new Dimension(720, 480));
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f.show();
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}
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}
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