%% Remove theta-Axis Tick Marks and Grid Lines
% Remove the tick marks and grid lines along the theta-axis by specifying the tick values as an empty array.

theta = 0:0.01:2*pi;
rho = sin(2*theta).*cos(2*theta);
polarplot(theta,rho)
thetaticks([])

% Copyright 2012 The MathWorks, Inc.