How to process an array of results in CodeIgniter -

here model. i'm not sure i'm on right track, start. have survey form on website , of values numeric in int fields. want compute average of each of 10 columns. rather computing each result separately, wondering if there way use loop process results. here is:

function survey_averages() {          $q = array(                     '1' => 'q1',                     '2' => 'q2',                     '3' => 'q3',                     '4' => 'q4',                     '5' => 'q5',                     '6' => 'q6',                     '7' => 'q7',                     '8' => 'q8',                     '9' => 'q9',                     '10' => 'q10'                     );           ($i=1; $i<11; $i++) {             $this->db->select_avg($q[$i]);             $query[$i] = $this->db->get('survey');         }          return $query;      } 

if i'm on right track, how results of array? if i'm on wrong track, need change? also, if in controller:

foreach($query->result_array() $row) { 

how return rows of array? php not letting me $row->1 or $row->'1'.

try var_dump($query->result_array())