ndgrid with unknown number of output arguments

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Jin
Jin 2011-4-19
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
  2 个评论
Laura Proctor
Laura Proctor 2011-4-19
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
Jin 2011-8-1
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.

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采纳的回答

Oleg Komarov
Oleg Komarov 2011-4-19
You were very close:
a = {0:5,0:1,3:10};
b = cell(1,numel(a));
[b{:}] = ndgrid(a{:});

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