Posts per day

[Brian]

I want to add this to the memberlist area. However when I do this it shows 0.00 for the posts per day :/

In memberlist.php on the top I added

$jointime = (time() - $userinfo[joindate]) / 86400; // Days Joined
  if ($jointime < 1) { // User has been a member for less than one day.
    $postsperday = "$userinfo[posts]";
  } else {
    $postsperday = sprintf("%.2f",($userinfo[posts] / $jointime));
  }

And then used the variable $postsperday in the memberlistbit template but it outputs 0.00 instead of their avb posts per day :/

Can anyone help

-Brian