How to create a matrix with arbitrary dimensions

Hi,

I like to create a matrix with arbitrary dimensions.

E.g., I need a function getMatrix(m, s), which returns a m-dimensional matrix with size s, filled with zeros or ones.

Could not working out until today, help is appreciated.

Answer 1

[Jos (10584)]

To create an zero array of an arbitray dimensions between 1 and D with arbitry sizes between 1 and S :

D = 10 ;
S = 6 ;
X = arrayfun(@(x) randi(S), 1:randi(D),'un',0)
M = zeros(X{:})
[size(M) ; [X{:}]]

[Michael Haitz]

Thank you, this is what I needed.

Maybe my question was not clear enough, I solved it the following way:

function [Res] = CreateMatrix(Dims, Sz)
    try        
        switch Dims
            case 1
                Res = zeros(1, Sz);
            otherwise    
                ds = ones(1, Dims);
                ds = ds .* Sz;
                Res = zeros(ds);
        end
    catch
        Res = [];
    end
end

[Jos (10584)]

You want a Sz-by-Sz-by- ... -by-Sz array, where Dims specfies the number of Sz's

Res = zeros(repmat(Sz, 1, D))

Answer 2

[Geoff Hayes]

Michael - this seems like a homework question so see zeros or ones for how to create a matrix of zeros or ones respectively. And see Declare function name, inputs, and outputs for how to build your function.

[Michael Haitz]

Ok, I didnt realize that 'ones' or 'zeros' can be called with arbitrary arrays as parameters.

If I take this in account, the solution is easy.

Thank you.