Method row

src/matrix.rs:589–595

Returns the row at index `n` (starting at zero) in O(1). ``` # #[macro_use] extern crate rustml; use rustml::*; # fn main() { let m = mat![ 1.0, 1.5; 2.0, 2.5; 5.0, 5.5 ]; assert_eq!(m.row(0).unwrap(), [1.0, 1.5]); assert_eq!(m.row(1).unwrap(), [2.0, 2.5]); assert_eq!(m.row(2).unwrap(), [5.0, 5.5]); assert!(m.row(3).is_none()) # } ```

(&self, n: usize)

    /// # }
    /// ```
    pub fn row(&self, n: usize) -> Option<&[T]> {

        match self.idx(n, 0) {
            None => None,
            Some(p) => Some(self.data.split_at(p).1.split_at(self.ncols).0)
        }
    }

    /// Returns the row at index `n` in O(1) that is mutable.
    ///