Help creating a 3D array

I currently have 27 Matlab files that I have been able to load. Each Matlab file has a 2D x-velocity field that shows up as a 40x50 Matrix.

I am trying to create a 3D array so that I can find the average of each point (i.e. avg of all i1j1s's) for all 27 files.

So far, the last step i have done is

for n=1:27:

...............................

xData = load(filename,'x');

I tried doing A(:,:,n)=xData, but I am unsure how to average from that set of data.

**TO CLARIFY:

The issue I am having right now is that the A(:,:,n)=xData makes an array of 1x1x27. I want to create an array that is 40x50x27

Answer 1

[Walter Roberson]

fileData = load(filename,'x');
xData = fileData.x;

load() of a .mat file returns a structure with fields named after the variables loaded.