Problem of tensor extraction

Answer 1

[Matt J]

Perhaps this is what you want,

sub=repmat({':'},1,n);
sub(i)={1};

Y=W(sub{:});

[Hancheng Zhu]

Nice code, bro. But the second line should be changed into sub{i} = l ;

[Matt J]

You're right, and I've edited the answer accordingly, but please Accept-click the answer if it provided what you needed.