%% Change Line Style, Color and Width
% Plot the contours of x^2 - y^2 as blue, dashed lines by specifying the LineSpec input. Specify a LineWidth of 2. Markers are not supported by fcontour.

syms x y
fcontour(x^2 - y^2,'--b','LineWidth',2)

% Copyright 2012 The MathWorks, Inc.