Function rgsl::fit::mul_est

pub fn mul_est(
    x: f64, 
    c1: f64, 
    cov11: f64, 
    y: &mut f64, 
    y_err: &mut f64
) -> Value

This function uses the best-fit linear regression coefficient c1 and its covariance cov11 to compute the fitted function y and its standard deviation y_err for the model Y = c_1 X at the point x.