%% Determine Whether Matrix Contains All Real Values
% Define a 3-by-4 matrix, A.

A = [7 3+4i 2 5i;...
     2i 1+3i 12 345;...
     52 108 78 3];

%
% Determine whether the array is real.

tf = isreal(A)

% Since A contains complex elements, isreal returns false.
% Copyright 2012 The MathWorks, Inc.