create symbolic expressions when using ndgrid

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Qun Wu
Qun Wu 2017-2-8
评论： Qun Wu 2017-3-17
I try to use function Ndgrid to get the grid coordinators.
Such as
[X1,X2,X3,...,Xn] = ndgrid(x1gv,x2gv,x3gv,...,xngv)
Suppose that the grid vectors are as each columns in a matrix M of size m-by-n.
Can someone help me to get the expression in the brackets, i.e. x1gv,x2gv,x3gv,...,xngv, please?
Thank you.

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采纳的回答

Walter Roberson
Walter Roberson 2017-3-16
[m, n] = size(M);
temp = mat2cell(M, m, ones(1, n) );
[X{1:n}] = ndgrid(temp{:});
temp2 = cellfun(@(v) v(:), X, 'uniform', 0);
result = horzcat(temp2{:});

更多回答（1 个）

Karan Gill
Karan Gill 2017-2-13
If I understand correctly, you are trying to do something like this?
>> A = sym('A%d',[1 4]);
B = sym('B%d',[1 4]);
>> [D1,D2] = ndgrid(A,B)
D1 =
[ A1, A1, A1, A1]
[ A2, A2, A2, A2]
[ A3, A3, A3, A3]
[ A4, A4, A4, A4]
D2 =
[ B1, B2, B3, B4]
[ B1, B2, B3, B4]
[ B1, B2, B3, B4]
[ B1, B2, B3, B4]

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