MATLAB: How to extract a nm from a kn*m

MATLABmatrix manipulation

I have a large k*n*m matrix and I want to be able to create an n*m for seperate values of k.

So I have tried this:

A = rand(2,3,4)
B(3,4)=0
B = A(2,:,:)

hoping to find a 3*4 matrix equal to the content of A(2,:,:). But this gives me a B(1,3,4) as a result.

Not sure that it should be this complicated?

doc squeeze

A = rand(2,3,4) ;
B = squeeze(A(2,:,:))

This works:

N = 3; 
M = 3;
a = (1:3)';
b = bsxfun(@plus, a, [0:M-1])
b =
     1     2     3
     2     3     4
     3     4     5

To initialize an N-by-M matrix, use the “zeros” function. For example, create a 3-by-5 matrix of zeros:

A = zeros(3,5);

You can then later assign specific values to the elements of “A”.