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Repeat elements of a vector as matrixes in a multidimensional array.

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Hello Everyone.
I want to repeat elements of a vector as matrixes in a multidimensional array. For example, say I have the vector v = [1 2 3 4 5]. Then I want to construct a three dimensional array w of dimension say 4*3*lenght(v) where: w(:,:,1) = v(1), w(:,:,2) = v(2), ... w(:,:,length(v)) = v(end). Is there a way to do this without using a for loop ? Any help would be precious.
Thank you.

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Accepted Answer

Robert U
Robert U on 2 Dec 2019
Hi Marius Adom,
If I understood your task correctly, you can use arrayfun() to create each x-y-Matrix and concatenate them using cat():
x = 4;
y = 3;
v = [1 2 3 4 5];
cOut = arrayfun(@(dIn,nInd) ones(x,y) .* dIn, v, 1:length(v), 'UniformOutput',false);
dOut = cat(3,cOut{:});
Kind regards,
Robert

More Answers (1)

James Tursa
James Tursa on 2 Dec 2019
Another way:
m = size of 1st dimension
n = size of 2nd dimension
v = your row vector
result = reshape(repmat(v,m*n,1),m,n,[]);