Function rgsl::fit::linear_est

pub fn linear_est(
    x: f64, 
    c0: f64, 
    c1: f64, 
    cov00: f64, 
    cov01: f64, 
    cov11: f64, 
    y: &mut f64, 
    y_err: &mut f64
) -> Value

This function uses the best-fit linear regression coefficients c0, c1 and their covariance cov00, cov01, cov11 to compute the fitted function y and its standard deviation y_err for the model Y = c_0 + c_1 X at the point x.