Interface DesignMatrix

src/regression.rs:168–170

Trait to create the design matrix of a matrix of features, i.e. a new column is inserted at the left of the matrix where all elements are equal to one. ``` # #[macro_use] extern crate rustml; use rustml::*; use rustml::regression::DesignMatrix; # fn main() { let m = mat![ 2.0, 3.0, 4.0; 5.0, 6.0, 7.0 ]; let d = m.design_matrix(); assert!( d.eq( &mat![ 1.0, 2.0, 3.0, 4.0; 1.0, 5.0, 6.0, 7.0 ] ) )

/// # }
/// ```
pub trait DesignMatrix<T> {
    fn design_matrix(&self) -> Self;
}

impl DesignMatrix<f64> for Matrix<f64> {
    fn design_matrix(&self) -> Self {