import java.awt.geom.*;


public class PointGeneratorExample4 {

    public static void main (String[] argv)
    {
        int numPoints = 100000;

        // Histogram of Y all by itself.
        DensityHistogram yHist = new DensityHistogram (0,10,20);
        for (int n=0; n<numPoints; n++) {
            Point2D.Double p = PointGenerator.randomPoint ();
            yHist.add (p.y);
        }
        yHist.display ();


        // Histogram of Y given X in [3,4].
        DensityHistogram yHist2 = new DensityHistogram (0,10,20);
        for (int n=0; n<numPoints; n++) {
            Point2D.Double p = PointGenerator.randomPoint ();
            if ( (3 <= p.x) && (p.x <= 4) ) {
                yHist2.add (p.y);
            }
        }
        yHist2.display ();
    }

}