public double Cdf(int k)
{
if (k < 0)
{
return(0);
}
if (k > N)
{
return(1);
}
return(BetaFunction.RegularizedIncompleteValue(N - k, 1 + k, 1 - P));
}
/// <summary> /// Cumulative distribution function /// </summary> public double Cdf(double x) => BetaFunction.RegularizedIncompleteValue(Alpha, Beta, x);
public double Cdf(double x)
{
double p = 0.5 * BetaFunction.RegularizedIncompleteValue(0.5 * df, 0.5, df / (df + x.Sqr()));
return(x > 0 ? 1 - p : p);
}