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    %% Re-evaluation on Zoom
% When you zoom into a plot, |fimplicit| re-evaluates the plot
% automatically. This re-evaluation on zoom can reveal hidden detail at smaller
% scales.
% 
% Divide a figure into two by using |subplot|. Plot $x \cos(y) + y
% \sin(1/x) = 0$
% in both the first and second subplots. Zoom into the second subplot by
% using |zoom|. The zoomed subplot shows detail that is not visible in the
% first subplot.

syms x y
eqn = x*cos(y) + y*sin(1/x) == 0;

subplot(2,1,1)
fimplicit(eqn)

subplot(2,1,2)
fimplicit(eqn)
zoom(2)