How can I isolate the (x, y) from a (x, y, z) dataset?

I have a 3D dataset (100x190x142) and I want to isolate the 100x190 (x, y)

How to do this in matlab?

Answer 1

[dpb]

Well, there are 142 100x190 arrays possible, which one(s) do you want?

Just index...

for i=1:size(XYX,3)          % iterate over all planes
  XY=XYZ(:,:,i);             % get the ith plane
  % operate on XY here
  ...
end

Of course, in general "the MATLAB way" would be to just operate on the ith piane and not actually create the temporary--in most cases it probably won't be needed.

Alternatively, depending upon what is meant by "isolate", you can return any subset of planes as another 3D array similarly---

iNeed=[1:3:size(XYZ,3)];     % some arbitary list of planes
XYZneed=XYZ(:,:,iNeed);      % that subarray (also 3D if numel(iNeed)>1)