Cakephp using the returned array values - cakephp-2.1

Question

I guess this should be smple, but I have been stuck at this for a while so I need help. I have a cakephp application and I am getting the following array:
chratSortedMean= array(
'totalAucFourHour' => array(
'Screening Visit-1 (scr)' => array(
'MmttFourthHour' => array(
'totalAucs' => array(
(int) 0 => (float) 0,
(int) 1 => (float) 220
)
)
),
'Month12' => array(
'MmttFourthHour' => array(
'totalAucs' => array(
(int) 0 => (float) 263.25,
(int) 1 => (float) 16.25
)
)
)
),
'totalAucTwoHour' => array(
'Day0' => array(
'MmttSecondHour' => array(
'totalAucs' => array(
(int) 0 => (float) 0,
(int) 1 => (float) 112.125
)
)
),
'DayD2' => array(
'MmttSecondHour' => array(
'totalAucs' => array(
(int) 0 => (float) 97.375,
(int) 1 => (float) 4.5
)
)
),
'Month3' => array(
'MmttSecondHour' => array(
'totalAucs' => array(
(int) 0 => (float) 8.53125,
(int) 1 => (float) 8.75
)
)
)
)
)
I want to calculate the mean of the totalAucs values for each of the timepoints(Screening Visit-1 (scr) , Month12, Day0 etc.) separately for the totalAucFourHour and totalAucTwoHour individually.
So the result i want is somewhat in the following form:
'totalAucFourHour' => array(
'Screening Visit-1 (scr)' => array(
'MmttFourthHour' => array(
'totalAucMean' => (float) 110
)
)
),
'Month12' => array(
'MmttFourthHour' => array(
'totalAucMean' => (float) 139.75
)
)
)
),
and so on. I do not want to use multiple for loops as i expect the data to grow in the future.

Answer 1

CakePHP has Core Utility Classes one of which is named Set. Set is the array manipulation
Class. You can call it from anywhere in your app with:
Set::methodNane();
What you need are the extract(); or classicExtract(); methods. Usage is fairly simple:
$Day0path = '/chratSortedMean/totalAucTwoHour/Day0/MmttSecondHour'
$arrayOfDay0s = Set::extract($Day0path, $data);
Check the other possibilities at the Cake Book. Also since CakePHP 2.2 there is a new array manipulation class Hash and it is faster. Since that version Set is actually deprecated but it will not be removed up until Cake 3.0.