how to change the values on the polar axis?

Dear sir/madam,

I am plotting antenna radiation patterns using matlab, using polar command. When I plot the radiation pattern using the polar command the polar axis shows [0 to 360] degrees. This is good for azimuthal angle. But for the elevation angle I need the polar axis to be shown as [0 to 180] on one side and [0 to -180] on the other side. How can I do this in matlab? Looking forward for your reply.

Thanking you, BSD

Answer 1

[Walter Roberson]

polar(....);
ph = allchild(gca);  %hidden children!!

Now, ph(6:17) are handles of text() objects whose String property is an angle. The correspondences are:

6: 0, 7: 180, 8: 330, 9: 150, 10: 300, 11: 120, 12: 270, 13: 90, 14: 240, 15: 60, 16: 210, 17: 30

Thus you would, for example, set(ph(8),'String','-30')

If you want the -180 to appear, you are going to have to text() a new label in to place. You could get() the Position of ph(7), fudge it a bit, and text() the '-180' in to place beside the '180'