Function r_mathlib::normal_cdf_both

pub fn normal_cdf_both(x: f64, mu: f64, sigma: f64, log_p: bool) -> (f64, f64)

Evaluate the culmulative density function of the normal distribution with mean mu and variance sigma at x. Both integrals ((-∞, x) and (x, ∞)) are returned in that order.

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.