Moin!
<?php
$coso = array (
"a" => array("2.5","2.6","8.8","3.2","8.4","6.1","12.3","16.8","19.8","10.7","8.8"),
"b" => array("2.4","2.5","9.2","3.3","8.1","5.4","111.2","16.9","20.2","11.4","9.4"),
);
echo $coso['a'][2];
erwartungsgemäß:
fastix@trainer:/tmp$ php test2.php
8.8
Wie lautet also Deine Frage? Oder hast Du etwa WIRKLICH erst den Array befragt, und ihn dann erst angelegt?
Jörg Reinholz