MATLAB: Polar plot being reflected

Question

I have been trying to plot a polar plot. However, MATLAB reflects the smaller loop. That loop is supposed to be on the left side of 0. Please help!

My code:

function micplothyp
theta=0:0.1:((2*pi)+1);
R= 0.25 + (0.75 * cos(theta));;
polarplot(theta,R,'r');
ax=gca;
ax.ThetaColor= 'k';
ax.ThetaAxis.Color='k';
ax.RTick= [0 0.2 0.4 0.6 0.8 1];
ax.RAxisLocation=30;
ax.Box='on';
ax.GridLineStyle='-.';
title('Response of a hyper-cardioid microphone');
end

Answer 1

Plot the absolute value of ‘R’:

polarplot(theta,abs(R),'r');

That should produce the plot you want.