Hello all! I have some ambiguity with MATLAB. I saved my matrix as A(:,:,1) in workspace. Now I want to access column or some entries of my big matrix on command window.

I have the following loop.

for i=1:4

A(:,:,i)=i*ones(4,4);

end

Now I want second rows of A(:,:,i) i.e second row of A(:,:,1), second row of A(:,:,2), second row of A(:,:,3) and second row of A(:,:,4).

Answer 1

[Wan Ji]

Do by following code

for i=1:4
 A(:,:,i)=i*ones(4,4);
end
 B = permute(A,[3,2,1]);
 B(:,:,2)

The result is

 ans =

     1     1     1     1
     2     2     2     2
     3     3     3     3
     4     4     4     4

[Teshome Kumsa]

Thanks Wan JI. I liked your answer. I just want to have 2nd row of A(:,:,2) only on my comand window(N.B a matrices of 4X4X4 are already in my workspace). The loop I posted is just a sample. The dimension of my project is very big(48251X6X80).

[dpb]

"I just want to have 2nd row of A(:,:,2) only on my comand window" @Teshome Kumsa

Well, that's just

B=A(2,:,2);

[Wan Ji]

Hi, Teshome Kumsa,

Follow pdb's answer. And transpose it.

B=squeeze(A(2,:,:))'; % B is what you want

Also without using squeeze, you can achieve it by

B = reshape(A(2,:,:), size(A,2), size(A,3))';

Answer 2

[dpb]

B=squeeze(A(2,:,:));

[Wan Ji]

A transpose is required.@dpb

[dpb]

If wanted, sure..