Function statrs::function::beta::checked_beta_reg

pub fn checked_beta_reg(a: f64, b: f64, x: f64) -> Result<f64>

Computes the regularized lower incomplete beta function I_x(a,b) = 1/Beta(a,b) * int(t^(a-1)*(1-t)^(b-1), t=0..x) a > 0, b > 0, 1 >= x >= 0 where a is the first beta parameter, b is the second beta parameter, and x is the upper limit of the integral.

Errors

if a <= 0.0, b <= 0.0, x < 0.0, or x > 1.0