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    %% Specify Line Color After Creation
% Create a polar plot and return the chart line object. 

theta = linspace(0,2*pi,25);
rho = 2*theta;
p = polarplot(theta,rho);

%%
% Change the line color and width and add markers.

p.Color = 'magenta';
p.Marker = 'square';
p.MarkerSize = 8;