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From: Johan Kristoff on 22 May 2010 11:47
Hello Everyone,
I'm trying to fit a set of x, y measurements to a parabola. For a conic section:
Ax^2+Bxy+Cy^2+Dx+Ey+F=0, most of fitting algorithms has B=0, making the curve symmetrical about the y-axis and which in turn, simplifies the process. In my case, however, B <> 0 which means the parabola is rotated. I looked at ODRPACK, but I'm not sure where to begin with my inputs for this orthogonal distance regression algorithm. In addition, I also would like to constrain A to a known constant.
Does anyone know of code or software that could solve this problem for me?
Thanks,
Johan
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