www.gusucode.com > graphics 案例源码程序 matlab代码 > graphics/PlotNegativeRadiusValuesExample.m

    %% Plot Negative Radius Values
% Create a polar plot using negative radius values. By default, |polarplot|
% reflects negative values through the origin.

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

%%
% Change the limits of the _r_-axis so it ranges from -1 to 1.
rlim([-1 1])