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    %% Elementwise Roots of Matrix  

%% 
% Create a matrix of bases, |X|, and a matrix of nth roots, |N|. 
X = [-2 -2 -2; 4 -3 -5]
N = [1 -1 3; 1/2 5 3] 

%%
% Each element in |X| corresponds to an element in |N|.  

%% 
% Calculate the real nth roots of the elements in |X|. 
Y = nthroot(X,N) 

%%
% Except for the signs (which are treated separately), the result is
% comparable to |abs(X).^(1./N)|. By contrast, you can calculate the
% complex roots using |X.^(1./N)|.