Array_walk average with multidimensional array

Question

I have an array and I want to make the average of its array element.

$array = array(
               '1' => array('1', '2'), 
               '2' => array('3', '7'), 
               '3' => array('5', '6'));

function average($arr)
    { if (!is_array($arr)) return false;
    return array_sum($arr)/count($arr); }

array_walk($array, 'average');
print_r($array);

The problem is that my function is not applied by array_walk. I got the exact same array I declared.

Nouphal.M · Accepted Answer · 2014-03-02 04:13:52Z

2

Try

function average($elem){
   return array_sum($elem)/sizeof($elem);
}               
$arr = array_map('average',$array);

See demo here

answered Mar 2, 2014 at 4:13

Nouphal.M

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1 Comment

Wistar Over a year ago

Short, quick, working well and a live demo. Thanks a lot

Exlord · Accepted Answer · 2014-03-02 04:14:37Z

0

you are returning the values from average function but not receiving it anywhere, if you wana change the multidimensional arrays values to their sum do this:

function average(&$arr)//&
{ 
    if (!is_array($arr)) return false;
    $arr = array_sum($arr)/count($arr); 
}

answered Mar 2, 2014 at 4:14

Exlord

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1 Comment

Wistar Over a year ago

I have already tried this solution and the result is the same

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