/// Flip the matrix around the vertical axis.
Flip the matrix around the vertical axis.
Flip the matrix around the vertical axis .
pub fn flip_lr(&mut self) {
        for r in 0..self.rows {
            self.data[r * self.columns..(r + 1) * self.columns].reverse();
        }
    }
pub fn flip_lr ( & mut self ) { for r in 0 .. self . rows { self . data [ r * self . columns .. ( r + 1 ) * self . columns ] . reverse ( ) ; } }
Flip the matrix around the vertical axis.
Flip the matrix around the vertical axis .
&mut self