%% Polar Axes Grid Lines and Labels
% This example shows how to plot a line in polar coordinates, label the angles in radians, and modify the grid line locations.
%% Create Polar Plot
% Plot a line in polar coordinates.

theta = linspace(0,4*pi);
rho = 2*theta;
polarplot(theta,rho);

%
%% Theta-Axis Units
% Use gca to access the polar axes and its properties. Label the angles in radians instead of degrees by changing the units.

pax = gca;
pax.ThetaAxisUnits = 'radians';

%
%% Theta-Axis Grid Lines
% Specify the theta values at which to display grid lines. Specify the values in radians since the ThetaAxisUnits property is set to radians.

pax.ThetaTick = 0:pi/4:2*pi;

%
%% R-Axis Limits
% Change the r-axis limits.

pax.RLim = [-5 25];

%
%% R-Axis Grid Lines
% Specify the radius values at which to display grid lines.

pax.RTick = -5:10:25;

% Copyright 2012 The MathWorks, Inc.