Add matrices

use ndarray::arr2;

fn main() {
  let a = arr2(&[[1, 2, 3],
    [4, 5, 6]]);
  let b = arr2(&[[6, 5, 4],
    [3, 2, 1]]);
  let sum = &a + &b;
  println!("{}", a);
  println!("+");
  println!("{}", b);
  println!("=");
  println!("{}", sum);
}