pub fn col(&self, j: usize) -> &[f64] {
        let index = j * self.nrows;

        &self.data[index..index + self.nrows]
    }
/// Get a "column" of the array as a slice.
Get a "column" of the array as a slice.
Get a " column " of the array as a slice .
pub fn col(&self, j: usize) -> &[f64] {
        let index = j * self.nrows;
        &self.data[index..index + self.nrows]
    }
pub fn col ( & self , j : usize ) -> & [ f64 ] { let index = j * self . nrows ; & self . data [ index .. index + self . nrows ] }
Get a "column" of the array as a slice.
Get a " column " of the array as a slice .
&self
j
usize