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I have a phase angle at some amplitude, Please check the image i attached , why is it not getting plotted at particular Angle? I have pasted my code as well,,,anyone help

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L K
L K on 18 Mar 2017
Commented: Image Analyst on 18 Mar 2017
phase = 26.52867848 amp = 0.463647609 theta_rad = phase ; polar(theta_rad, amp, 'r.');
Output is
: See the red dot,, it should have got plotted at 26 Degree at that particular AMP(Radius)...What is the prob ?

Accepted Answer

Star Strider
Star Strider on 18 Mar 2017
It is plotting correctly (the red dot at about 80°) if ‘phase’ is actually in radians. If it’s in degrees and you want to convert it to radians, do the conversion first:
phase = 26.52867848;
amp = 0.463647609;
theta_rad = phase*pi/180; % Degrees-To-Radians
polar(theta_rad, amp, 'r.')
  3 Comments
Image Analyst
Image Analyst on 18 Mar 2017
By the way, polar() is deprecated. They recommend you start using polarplot() from now on, if you have R2016a or later.
You might also find deg2rad() or cart2pol() helpful.

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