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

Example 1 with ChiSquareDistribution

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

the class ChiSquareDistributionDemo method stateChanged.

@Override
public void stateChanged(ChangeEvent e) {
    if (e.getSource() == kSlider) {
        k = kSlider.getValue();
        if (k == 0)
            k = 1;
        ChiSquareDistribution dist = new ChiSquareDistribution(k);
        double[][] p = new double[100][2];
        double[][] q = new double[100][2];
        for (int i = 0; i < p.length; i++) {
            p[i][0] = i / 2.0;
            p[i][1] = dist.p(p[i][0]);
            q[i][0] = i / 2.0;
            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();
    }
}