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    %% Specify Disk Plotting Range
% First, plot the expression |sin(x^2 + y^2)| over the square range
% |-pi/2 < x < pi/2|, |-pi/2 < y < pi/2|.

% Copyright 2015 The MathWorks, Inc.

syms x y
ezsurf(sin(x^2 + y^2), [-pi/2, pi/2, -pi/2, pi/2])
%%
% Now, plot the same expression over the disk range.
ezsurf(sin(x^2 + y^2), [-pi/2, pi/2, -pi/2, pi/2],'circ')