MATLAB: 3D matrix, max in z direction

Question

Hello all ,

I am working with data arranged in a large 3D matrix and am wondering how I might find the maximum value in the Z direction of all elements at a specific x,y coordinate.

For example, if:

A = [1 2 3; 4 7 8]
B = [6 4 2; 3 5 7]
C = [3 3 9; 2 3 2]

and i arrange the matrix as such:

data_3d = cat(3, A, B, C)

I would like to find the maximum value of all 'z' elements positioned at the x,y coordinates(1,1) compared to each other, where: max_1 = 6

Is there a simple function to do this, or is it necessary to call each individual element in the following manner:

max_1 = max([A(1,1) B(1,1) C(1,1)])

(will this ^ even work?)

A bit of a matlab newbie, and any help is greatly appreciated. 🙂 Thank you for your time

Answer 1

Try this:

max_data_3d = max(data_3d, [], 3)
max_data_3d =
       6     4     9
       4     7     8