Creating a N-Dimentional matrix from a 2 Dimentional matrix

Let's assume I have a as [1 2;3 4]. I need to create b to be 2-by-2-by-100 as follows: b(:,:,1)=[1 2;3 4] . . b(:,:,100)=[1 2;3 4]

I know that function 'cat' works but it's required to repeat the [1 2;3 4] hundred times which is not applicable. Which function should I use here?

Thanks,

Answer 1

[Honglei Chen]

a = [1 2 ;3 4]
b = reshape(repmat(a(:),1,100),[size(a) 100]);

[Jalali]

Thanks!

How about this case:

I need to create b as 100-by-10-by16 based on a=[1:16]

The following code works, but do you have any simpler idea?

q=repmat(a,[100 1]);

w=reshape(repmat(q(:),1,10),[ size(q) 10]);

b=permute(w,[1 3 2]);