import java.awt.*;


class PlotFrame extends Frame {

  double[][] points;
  int size = 500;
  int offset = 30;
  
  PlotFrame (double[][] points) {
    super("Data plot");
    this.points = points;
    resize(size + 2*offset, size + 2*offset);
    show();
  }

  public void paint (Graphics g) {
    int npoints = points[0].length;
    int[] xpoints = new int[npoints];
    int[] ypoints = new int[npoints];
    double xmin = min(points[1]);
    double xmax = max(points[1]);
    double ymin = min(points[2]);
    double ymax = max(points[2]);
    for (int i=0; i<npoints; i++) {
      xpoints[i] = (int) (size / (xmax - xmin) * (points[1][i] - (xmax + xmin)/2.));
      ypoints[i] = (int) (size / (ymax - ymin) * (points[2][i] - (ymax + ymin)/2.));
    }
    g.translate(offset + size/2, offset + size/2);
    g.drawPolygon(xpoints, ypoints, npoints);
  }

    public boolean handleEvent (Event evt) {
    if (evt.id == Event.WINDOW_DESTROY) {
      dispose();
      SecurityManager security = System.getSecurityManager();
      if (security == null) {
        System.exit(0);
      }
    }
    return super.handleEvent(evt);
  }

  double max (double[] values) {
    double m = Double.MIN_VALUE;
    for (int i=0; i<values.length; i++) {
      m = Math.max(m, values[i]);
    }
    return m;
  }

  double min (double[] values) {
    double m = Double.MAX_VALUE;
    for (int i=0; i<values.length; i++) {
      m = Math.min(m, values[i]);
    }
    return m;
  }


}