| T O P I C R E V I E W |
| Kalajian |
Posted - 08/11/2003 : 11:17:49 AM
I need to do a Leas Squares Fit to a circle. Can origin do this? I am having trouble finding informaion on what my equation should be. I figured the x is ind. the Y is dep. and the coordinates of the origin and the radius are my parameters. So I understand this correctly? How would I write the (x-a)^2+(y-b)^2=r^2 standard eqn. of a circle for this use?
Thank you
Jill Kalajian |
| 1 L A T E S T R E P L I E S (Newest First) |
| easwar |
Posted - 08/12/2003 : 10:37:28 PM
Hi Jill,
You can turn the equation around and write it as
y = b +/- sqrt( r^2 - (x-a)^2)
But then for each value of x, there are two possible values of y and so cannot fit the entire circle simultaneously. You could only fit one half of the circle at a time, by picking the + or - sign for the two halves. Would that work for you?
Easwar
OriginLab.
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