A question about CI's new form validation class

[eluser]jrad[/eluser]
I've been using CI's new form validation class lately and wanted to ask something regarding radio buttons validation.

This is a code snippet on my View:

Code:

<p>&lt;input type="radio" name="groupradio" value="1" &lt;?= set_radio('groupradio','1'); ?&gt;&gt;Group 1</p>
<p>&lt;input type="radio" name="groupradio" value="2" &lt;?= set_radio('groupradio','2'); ?&gt;&gt;Group 2</p>

I'm wondering if this is correct, to set form validation on the radio buttons:
Controller:

Code:

$this->form_validation->set_rules('groupradio','Group 1','required')
$this->form_validation->set_rules('groupradio','Group 2','required')