circle least square method

Question

Josefina Ottitsch 2019-4-19

回答： Jim Riggs 2019-4-19

Hello

I have already looked into the info on the least square method in matlab, but I do not understand how I'm supposed to program the code.

If I have a function similar to this:

x=0:.1:2
f=sin(x)
plot(sin(x))
hold on

How do I create a circle in my figure, which fits within 3 points on my function by using the least square method?

thanks for the support!

Answer 1

Jim Riggs 2019-4-19

You don't need to use least squares to "fit" a circle to 3 points, because 3 points will uniquely define a single circle.

See the attached paper.