Generate matrices of the form [a b c d]

If I have matrices of the form [a b c d]

where

2<=a<=4

1<=b<=2

3<=c<=4

2<=d<=4

Could someone help me with the code/pseudo code to generate all possible matrices?

[per isakson]

Are a,b,c,d whole numbers? If not, there will be very many possible vectors.

[laurie]

yes they are whole numbers

[Stephen23]

You can easily generate a cell array containing the requested permutations:

X = cell(1,4);
[~,X{:}] = ndgrid(1,2:4,1:2,3:4,2:4);
X = num2cell(cat(1,X{:}),1);

Answer 1

[Image Analyst]

Of course you could just do a trivial, brute force way of 4 nested "for" loops, which I'm sure you can do. (If not, let us know.) But I'm thinking that you're wanting some more clever method, right? Or not right, and the trivial way is fine?

Oh well, here's the trivial way, just to save time:

for a = 2:4
  for b = 1:2
    for c = 3:4
      for d = 2:4
        out = [a,b,c,d]
      end
    end
  end
end

[laurie]

I thought of this, but was wondering if there was another way...