Examples with BetaDistribution smile.stat.distribution.BetaDistribution used on opensource projects

Example 1 with BetaDistribution

use of smile.stat.distribution.BetaDistribution in project smile by haifengl.

the class BetaDistributionDemo method stateChanged.

@Override
public void stateChanged(ChangeEvent e) {
    if (e.getSource() == alphaSlider || e.getSource() == betaSlider) {
        alpha = alphaSlider.getValue() / 10.0;
        beta = betaSlider.getValue() / 10.0;
        if (alpha == 0)
            alpha = 0.01;
        if (beta == 0)
            beta = 0.01;
        BetaDistribution dist = new BetaDistribution(alpha, beta);
        double[][] p = new double[99][2];
        double[][] q = new double[99][2];
        for (int i = 0; i < p.length; i++) {
            p[i][0] = (i + 1) / 100.0;
            p[i][1] = dist.p(p[i][0]);
            q[i][0] = (i + 1) / 100.0;
            q[i][1] = dist.cdf(p[i][0]);
        }
        pdf.clear();
        pdf.line(p, Line.Style.SOLID, Color.BLUE);
        cdf.clear();
        cdf.line(q, Line.Style.SOLID, Color.BLUE);
        double[] data = new double[500];
        for (int i = 0; i < data.length; i++) {
            data[i] = dist.rand();
        }
        histogram.clear();
        histogram.histogram(data, 20, Color.BLUE);
        qqplot.clear();
        qqplot.add(new QQPlot(data, dist));
        canvas.repaint();
    }
}