[SOLVED] How to call a column instead of row in a multidimensional array

[cmor]

Very simple question but I'm having trouble finding an answer by searching the forum.

 

I have a 2-d array.  I want to pass columns from the 2-d array to a file that will graph the columns.

 

Let's say its called my2darray

 

I can pass a row with something like my2darray[4]

 

But I can't pass a specific column with my2darray[][4]

 

Any help with the syntax or a link to the solution would be helpful.  Do I have to use a loop to call a whole column?

Thanks for the help. 

[Barand]

try

<?php
function cols2rows(&$array)
{
    $newarray = array();
    foreach ($array as $ar)
    {
        $k = count($ar);
        for ($i=0; $i<$k; $i++)
        {
            $newarray[$i][] = $ar[$i];
        }
    }
    return $newarray;
}


$my2darray = array (
            array ('a', 1,2,3,4),
            array ('b', 2,3,4,5),
            array ('c', 3,4,5,6)
        );

$new2d = cols2rows($my2darray);
?>

 

Now pass $new2d[4] to the graph.

[cmor]

Thanks, so to confirm there's no way to call a column?  You have to switch the array's dimensions around?

[Barand]

That, or loop through the array each time gathering the contents of the Nth element.

$data = array();
foreach ($my2darray as $ar)
{
     $data[] = $ar[4];
}

As you said you wanted to pass columns (plural) to the graph, I thought you may as well do them all in one operation