a'>y</span><span class='op'>$</span><span class='va'>row</span> <span class='op'>&lt;-</span> <span class='va'>y</span><span class='op'>$</span><span class='va'>row</span> <span class='op'>+</span> <span class='fl'>5</span>
<span class='va'>y</span><span class='op'>$</span><span class='va'>col</span> <span class='op'>&lt;-</span> <span class='va'>y</span><span class='op'>$</span><span class='va'>col</span> <span class='op'>+</span> <span class='fl'>5</span>
<span class='fu'>rectify</span><span class='op'>(<