How can I make a loop inside a loop k time

For example:

I want to create fonction that get matrix: A=[3 5 6]

and do the next steps:

for i1=1:A(1); for i2=1:A(2); for i3=1:A(3); B=[i1 i2 i3]; end end end

But the length of A can vary. thank you

Answer 1

[Andrei Bobrov]

Use function fullfact from Statistics Toolbox

B = fullfact(A);

or

a = arrayfun(@(x)1:x,A,'un',0);
[i3,i2,i1] = ndgrid(a{end:-1:1});
B = [i1(:),i2(:),i3(:)];

or

B = zeros(prod(A),3);
k = 1;
for i1 = 1:A(1)
    for i2 = 1:A(2)
        for i3 = 1:A(3)
            B(k,:) = [i1,i2,i3]; 
            k = k +1; 
        end
    end
end

Answer 2

[muly san]

thank you.

It was just an example. I want to know how to do the loop inside a loop k time anyway.