class Fivenum {
    static double median(double[] x, int start, int endInclusive) {
        int size = endInclusive - start + 1
        if (size <= 0) {
            throw new IllegalArgumentException("Array slice cannot be empty")
        }
        int m = start + (int) (size / 2)
        return (size % 2 == 1) ? x[m]: (x[m - 1] + x[m]) / 2.0
    }

    static double[] fivenum(double[] x) {
        for (Double d: x) {
            if (d.isNaN()) {
                throw new IllegalArgumentException("Unable to deal with arrays containing NaN")
            }
        }
        double[] result = new double[5]
        Arrays.sort(x)
        result[0] = x[0]
        result[2] = median(x, 0, x.length - 1)
        result[4] = x[x.length - 1]
        int m = (int) (x.length / 2)
        int lowerEnd = (x.length % 2 == 1) ? m: m - 1
        result[1] = median(x, 0, lowerEnd)
        result[3] = median(x, m, x.length - 1)
        return result
    }

    static void main(String[] args) {
        double[][] xl = [
            [15.0, 6.0, 42.0, 41.0, 7.0, 36.0, 49.0, 40.0, 39.0, 47.0, 43.0],
            [36.0, 40.0, 7.0, 39.0, 41.0, 15.0],
            [
                0.14082834, 0.09748790, 1.73131507, 0.87636009, -1.95059594, 0.73438555,
                -0.03035726, 1.46675970, -0.74621349, -0.72588772, 0.63905160, 0.61501527,
                -0.98983780, -1.00447874, -0.62759469, 0.66206163, 1.04312009, -0.10305385,
                0.75775634, 0.32566578
            ]
        ]
        for (double[] x: xl) {
            println("${fivenum(x)}")
        }
    }
}