%% Specify r-Axis Tick Values and Labels
% Create a polar plot. Display tick marks and grid lines along the r-axis at the values 0.1, 0.3, and 0.5. Then, specify a label for each tick mark.

theta = linspace(0,2*pi);
rho = theta/10;
polarplot(theta,rho)
rticks([0.1 0.25 0.5])
rticklabels({'r = .1','r = .3','r = .5'})

% Copyright 2012 The MathWorks, Inc.