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ポワソン分布発生　

Java

Last updated at 2019-04-28Posted at 2013-01-09

int poisson(double lambda)  {
    double xp;
    int k = 0;
    xp = Math.random();
    while (xp >= Math.exp(-lambda)) {
        xp = xp * Math.random();
        k = k + 1;
    }
    return (k);
}

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