How to recenter a circle?

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!

Answer 1

[KSSV]

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.

[Aurea94]

Oh my! Of course! Subtracting the real center position to all the coordinates worked!

Thanks a lot!