How can I make an array or list consisting of equally sized vectors?

I want to create an array of identical vectors, each with two componenets. I have a function that takes the cartesian product of any amount of vectors. So, seeing as I want to find the cartesian product of many vectors, I'd like to simply be able to input an array of these vectors into the function. EDIT: First off, this is the function I'm trying to use: http://www.mathworks.com/matlabcentral/fileexchange/5898-setprod For example, say I want to find the cartesian product of [1,-1] [2,4] [6,5] [8,9] but, rather than type

setprod([1,-1] [2,4] [6,5] [8,9])
I want to put the vectors in an array first, then input that array into the function. 
So:

a = ([1,-1] [2,4] [6,5] [8,9])
setprod(a)
The only issue is, I don't know how to save the vectors in an array such that the function can read them each as separate vectors. (In my actual program I have too many arrays to write out)

[Image Analyst]

Please give a small example.

[Daniel]

Okay.

Answer 1

[Star Strider]

Use a cell array:

f = @(a,b,c,d) [a b c d];

a = 3;  b = 5;  c = 7;  d = 13;

args = num2cell( [ a b c d ] );

fa = f(args{:})

This is only an illustration, but you can likely adapt it to your situation.

[Daniel]

What here is the cell array? Can you add some comments or a short explanation please?

[Star Strider]

Sure!

The ‘f’ anonymous function is simply created to illustrate the idea.

The cell array is created by num2cell in the ‘args’ assignment. You could also do the ‘args’ assignment as:

args = {a b c d};

although if you have an array, passing arguments to num2cell is probably easiest. Your call as to what’s best in your application.

In the ‘fa’ assignment (that calls ‘f’), args{:} distributes the elements of its cell array across the argument list of ‘f’, as illustrated by this line:

[q1 q2 q3 q4] = args{:}

that produces:

q1 =

       3

q2 =

       5

q3 =

       7

q4 =

      13

It’s just the magic of cell arrays!