how to loop in dynamic dimension matrix?

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Pengyuan Zhu 2019-8-26

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评论： Walter Roberson 2019-8-26

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How could i loop in dynamic dimension array?

Currently i'm using switch-case statement, but the code looks redundant, and it can only support limited dimension.

function mode_vec = gen_mode_vec(freq,signal_size)
    mat=zeros(signal_size);
    dimension=length(signal_size);
    switch dimension
    case 1
        for m=1:signal_size(1)
            mode_vec(m)=exp(1i*dot(m,freq));  
        end  
    case 2
        for m=1:signal_size(1)
            for n=1:signal_size(2)
                mode_vec(m,n)=exp(1i*dot([m,n],freq));
            end
        end 
    case 3
        for m=1:signal_size(1)
            for n=1:signal_size(2)
                for k=1:signal_size(3)
                    mode_vec(m,n,k)=exp(1i*dot([m,n,k],freq));
                end
            end
        end 
    case 4
        for m=1:signal_size(1)
            for n=1:signal_size(2)
                for k=1:signal_size(3)
                    for p=1:signal_size(4)
                        mode_vec(m,n,k,p)=exp(1i*dot([m,n,k,p],freq));
                    end
                end
            end
        end 
    otherwise
        fprintf('only support dimension 1-4\n' );
    end
    mode_vec=reshape(mat,[],1);
end