| public Poisson ( double mean ) : int | ||
| mean | double | The expected mean of the random numbers. |
| return | int | |
public int Poisson(double mean)
{
if (mean < 0) {
throw new ArgumentException("mean (" + mean +
") is less than 0");
}
double l = Math.Exp(-mean);
var k = 0;
double p = 0;
do {
++k;
p *= this.Uniform();
} while (p > l);
return k - 1;
}