How to use argmax in 3D matrices?

I am new to Matlab. I have a 3D Matrix say M(x,y,k). I need to find a 2D Matrix D(x,y) such that D(x,y) has the highest values of M{k}, OR :

D(x,y) = argmax( M(x,y,k) )

Answer 1

[John D'Errico]

Um, read the help for max? If you are that much of a beginner, then you should start out by reading the getting started tutorials.

A = rand(2,3,4)
A(:,:,1) =
          0.18558767031022         0.367693411562176         0.949304929946452
         0.125794384998311         0.825831885926276         0.798028693039495
A(:,:,2) =
          0.46387357998381         0.702317087838322         0.232451965165933
         0.614238220285913         0.526032548266009         0.106738218529651
A(:,:,3) =
         0.956797183291321        0.0699667778161488         0.611150494847145
         0.662423347108867         0.892792624243972         0.585063797123285
A(:,:,4) =
         0.852340132245934         0.377986141768676         0.490544298291429
         0.659436276865168         0.738620002236467        0.0429808680184772

[M,ind] = max(A,[],3)
M =
         0.956797183291321         0.702317087838322         0.949304929946452
         0.662423347108867         0.892792624243972         0.798028693039495
ind =
     3     2     1
     3     3     1