removing values, connect lines and change thickness of border in a polar plot

Hi,

I used polarplot function.

(i) I would like to remove the rho values suchas 0, 100, 200, 300.

(ii) I also want to draw a dotted line connecting 0 and 180.

(iii) How to make the border of polar plot thicker.

thanks a lot in advance.

Answer 1

[Chunru]

theta = 0:.01:2*pi;
rho = sin(2*theta).*cos(2*theta);
polarplot(theta, rho);
h = gca;
h.RTickLabel = [];   % remove rho values
%ii) I also want to draw a dotted line connecting 0 and 180.
rl = rlim; hold on
polarplot([0 pi], rl(2)*[1 1], 'g--'); %or :
polarplot([3*pi/2 pi/2], rl(2)*[1 1], 'g--');
%(iii) make the border thicker
polarplot(linspace(0, 2*pi, 61), rl(2)*ones(61,1), 'k-', 'LineWidth', 2)

[HYZ]

for (iii), sorry there was a typo. I wanted to make the border of the plot thicker.

[Chunru]

See the update above.

[HYZ]

rl = rlim; hold on

polarplot([0 pi], rl(2)*[1 1], 'g--');

polarplot([3*pi/2 pi/2], rl(2)*[1 1], 'g--');

can I do if I also want another dotted line connecting 90 and 270?

Thanks a lot!

[Chunru]

Yes. Why not? See above.