I created a front end form which as the following radio button
<?php
piklist(‘field’, array(
‘type’ => ‘select’
,’field’ => ‘gender’
,’value’=> ‘m’
,’label’ => ‘Gender’
,’list’=> false
,’required’ => ‘true’
,’choices’ => array(
‘m’ => ‘Male’
,’f’ => ‘Female’
)

?>

I want to insert the value of this radio button to my custom table named wp_mytable. How should I use the name of this radio button in _POST variable so that I can pass that to wp_mytable?