Function r_stats::geometric_cdf

pub fn geometric_cdf(x: f64, p: f64, lower_tail: bool, log_p: bool) -> f64

Evaluate the culmulative distribution function of the geometric distribution with trial probability p at x. P(X=x) = p(1-p)^x.

If lower_tail is true, the integral from -∞ to x is evaluated, else the integral from x to ∞ is evaluated instead. "Usual" behaviour corresponds to true. Using lower_tail = false gives higher numerical accuracy than performing the calculation 1 - result on lower_tail = true (when the result is close to 1).

If log_p is true, the natural logarithm of the value will be returned, with potentially higher numerical accuracy than calling .ln() on the result.