Generate cell of random numbers with same size arrays
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Riccardo Zabatta
le 6 Mar 2021
Commenté : Riccardo Zabatta
le 8 Mar 2021
Hello!
I'd like to generate a 3x2 cell, whose arrays are all matrices 5x100 of random numbers.
I am a bit struggling with it, despite I think is quite easy to do.
Any suggestion?
Thanks
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Jan
le 6 Mar 2021
A a 3x2 cell with containing 5x100 matrices, a 15 x 200 random matrix is needed. Why do you create a 18x100 matrix?
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Jan
le 6 Mar 2021
Modifié(e) : Jan
le 6 Mar 2021
Creating a large array only to split it into parts needs more RAM than creating the random matrices in parts directly:
C = cell(3, 2);
for k = 1:numel(C)
C{k} = randi(50, 5, 100);
end
If mat2cell is required for any reasons:
a = randi(50, 15, 200);
A = mat2cell(a, [5, 5, 5], [100, 100])
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John D'Errico
le 6 Mar 2021
Modifié(e) : John D'Errico
le 6 Mar 2021
Simple enough.
A = rand(15,200);
B = mat2cell(A,repmat(5,3,1),repmat(100,1,2));
size(B)
size(B{1,1})
class(B{1,1})
So B is a cell array of size 3x2.
Each element of B is a regular double precision array, of size 5x100. You can put whatever you kind of random numbers you wish into the original array A.
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