Cell by cell evaluation across dimensions

I'll start with I'm brand new to MATLAB, with only about 10 hours of trainging with it. It seems like as soon as I get close to an answer in a training document or video, it stops with the topic and moves on to something else.

If create 4, 3x3 arrays of random numbers using : data = rand(3,3,4)

I get:

data(:,:,1) =
    0.6312    0.2242    0.3872
    0.3551    0.6525    0.1422
    0.9970    0.6050    0.0251
data(:,:,2) =
    0.4211    0.3704    0.5710
    0.1841    0.8416    0.1769
    0.7258    0.7342    0.9574
data(:,:,3) =
    0.2653    0.3736    0.1806
    0.9246    0.0875    0.0451
    0.2238    0.6401    0.7232
data(:,:,4) =
    0.3474    0.6273    0.8006
    0.6606    0.0216    0.7458
    0.3839    0.9106    0.8131

I'm trying to find the highest value of a cell across all for pages so the end result would be something like

Result =

0.6312 0.6273 0.8006

0.9246 0.8416 0.7458

0.9970 0.9106 0.9574

I've been trying to use the max function, but I can't seem to get it to go the right way. I'm fine across row's and columes but not for a cell going though pages.

Answer 1

[Walter Roberson]

max(data, [], 3)

[Micheal Peters]

Thank you for the answer. I would say that seems to easy, but that just seems to be the case with this software. I need to go back into the manual and see what that 3 is for, and unless you have time to explain?

[Walter Roberson]

max() and min() have a calling sequence that is slightly different than most functions.

max(A) would be the maximum of A along the first non-singular dimension.

max(A,B) when B is not empty, would be the maximum of corresponding elements of A and B, so max([A(J,K), B(J,K)]) for each J,K . So max(A,3) would be the maximum of the number 3 or the contents of A

max(A,B,d) is an error if B is not empty. When B is empty, the maximum of A is taken along the dimension indicated by d. So max(A,[],3) means the maximum along dimension #3.

This is a bit different than functions such as median, where the dimension number is the second argument, median(A,3) is median along dimension #3. But watch out for std(): std(A,3) would use 3 as the weight vector, and the dimension number needs to go third, std(A,[],3)

[Micheal Peters]

Thank you for the answer and the explination