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.

1 次查看（过去 30 天）

Teshome Kumsa 2021-8-23

评论： Wan Ji 2021-8-23

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).

Wan Ji 2021-8-23

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
   2     2     2
   3     3     3
   4     4     4

dpb 2021-8-23

"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 2021-8-23

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))';

MATLAB Language Fundamentals Data Types Numeric Types Logical

在 Help Center 和 File Exchange 中查找有关 Logical 的更多信息

Find the treasures in MATLAB Central and discover how the community can help you!

Translated by