%% Change Line Properties and Display Markers
% Plot three concentric circles of increasing diameter. For the first line, use a linewidth of 2. For the second, specify a dashed red line style with circle markers. For the third, specify a cyan, dash-dot line style with asterisk markers. Display the legend.

syms x y
circle = x^2 + y^2;
fimplicit(circle == 1, 'Linewidth', 2)
hold on
fimplicit(circle == 2, '--or')
fimplicit(circle == 3, '-.*c')
legend('show','Location','best')
hold off

% Copyright 2012 The MathWorks, Inc.