Indexing high dimension elements from a N-D matrix

Hi, all,

I met a problem when I was trying to index the third dimension elements of a 3-dim matrix, i.e.

A=rand(10,10,10);

B=A(1,1,:);

, I found B was not a vector as I expected, but rather, a 1-by-1-by-10 array. But A(:,1,1) and A(1,:,1) return a column and row vector respectively.

I wonder why MATLAB is designed in this way and how to obtain what I want ?

I know a workaround is use squeeze(A(1,1,:)), which ignores the singleton dimensions. Is there any other more direct way?

Thanks.

[Matt J]

I wonder why MATLAB is designed in this way

As you already pointed out, A(:,1,1) and A(1,:,1) are not the same shape and have singleton dimensions where you provided singleton subscripts. If that makes sense to you, why should A(1,1,:) obey a different rule?

Answer 1

[Matt J]

B(1:10)=A(1,1,:)

[Junhong YE]

Thanks.