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How to recenter a circle?

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Aurea94 on 5 May 2020
Commented: Aurea94 on 5 May 2020
I am trying to fit experimental data of a gear 2D measurement.
I fit external diameter with the the function circfit so that I get external radius value and real center (x,y) of the these coordinates.
Now, I would like to move this data into a centered circle in (0,0). How can I do this?
Thank you very much for your help!


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Accepted Answer

KSSV on 5 May 2020
Edited: KSSV on 5 May 2020
If you know Radius and center of circle, you can draw using:
R = 2. ; % say R is 2
C = [0. 0.] ; % Let center be origin
th = linspace(0,2*pi) ;
x = R*cos(th) ; y = R*sin(th) ;
xc = C(1)+x ;
yc = C(2)+y ;
plot(xc,yc) ;
As you know Radius, you can follow the above steps.
If you want to shift the center, from the circle coordinates, subtract the center, the circle will be centered at origin.

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Aurea94 on 5 May 2020
Oh my! Of course! Subtracting the real center position to all the coordinates worked!
Thanks a lot!

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