Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package dataminning2; import java.awt.*; import java.awt.*; import java.awt.geom.*; import javax.swing.*; import javax.swing.JPanel; import org.apache.commons.math3.linear.AnyMatrix; /** * * @author SuperUser */ public class Graphplot extends JPanel { double[] dataX = null; double[] dataY = null; double[][] data = null; public Graphplot(double[][] Data) { dataX = new double[Data.length]; dataY = new double[Data.length]; for (int i = 0; i < Data.length; i++) { dataX[i] = Data[i][0]; dataY[i] = Data[i][1]; data = Data; } } final int PAD = 20; protected void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2 = (Graphics2D) g; g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); int w = getWidth(); int h = getHeight(); // Draw ordinate. g2.draw(new Line2D.Double(PAD, PAD, PAD, h - PAD)); // Draw abcissa. g2.draw(new Line2D.Double(PAD, h - PAD, w - PAD, h - PAD)); double xInc = (double) (w - 2 * PAD) / (data.length - 1); double scale = (double) (h - 2 * PAD) / 88; // Mark data points. g2.setPaint(Color.red); int length1 = 0; int length2 = data.length / 3; for (int i = 0; i < length2; i++) { double x = PAD + i * dataX[i]; double y = h - PAD - scale * dataY[i]; g2.fill(new Ellipse2D.Double(x - 2, y - 2, 4, 4)); } g2.setPaint(Color.BLUE); int lengthnew = length1 + length2; length2 = length2 + lengthnew; for (int i = lengthnew; i < length2; i++) { double x = PAD + i * dataX[i]; double y = h - PAD - scale * dataY[i]; g2.fill(new Ellipse2D.Double(x - 2, y - 2, 4, 4)); } g2.setPaint(Color.YELLOW); lengthnew = lengthnew + lengthnew; for (int i = length2; i < data.length; i++) { double x = PAD + i * dataX[i]; double y = h - PAD - scale * dataY[i]; g2.fill(new Ellipse2D.Double(x - 2, y - 2, 4, 4)); } } private int getMax() { int max = -Integer.MAX_VALUE; for (int i = 0; i < data.length; i++) { if (dataY[i] > max) max = (int) dataY[i]; } return max; } public void Main() { } }