ndgrid with unknown number of output arguments

Hi, I am trying to make something work using ndgrid. Here is a copy of the response:

a={0:5,0:1}

a =

    [1x6 double]    [1x2 double]

>> b=cell(1,2)

b =

    []    []

>> b{1:2}=ndgrid(a{:}) ??? The right hand side of this assignment has too few values to satisfy the left hand side.

Obviously ndgrid cannot recognize b{1:2} as two output arguments. The truth is I generally don't know how many elements are there in "a" a priori. Is there an easy way to deal with it, aside from using "eval"? I'm using version 2010a. Thank you very much.

Jin

[Laura Proctor]

Is there a reason that you're using cell arrays rather than doubles in this case? What is it you're trying to do with NDGRID?

[Jin]

I may not know a priori how many vectors in "a{:}" are plaided, thus how many output are there going to be. I could write

[b1,b2,b3,...,bn]=ndgrid(a1,a2,...,an)

but I don't know what n is.

Answer 1

[Oleg Komarov]

You were very close:

a = {0:5,0:1,3:10};
b = cell(1,numel(a));

[b{:}] = ndgrid(a{:});