Optimal Fit: Two Conn. Lines w/ Diff. Slopes

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Michael
Michael on 16 Nov 2013
Commented: Michael on 20 Nov 2013
Hello,
If my data are distributed like two lines who intersect i.e. one line goes until some point, and at that point another line emerges with a different slope (they share the same sign).
Is there a way to find
  1. equations of each of the lines
  2. an estimate of the crossover x-value which lies between each curve
  3. a fit goodness measure (Sigma, or chisq?)
I've been looking online for awhile online and I haven't found anything. Any help would be much appreciated.
Thanks,
Michael

Answers (1)

Matt J
Matt J on 16 Nov 2013
So basically you're looking for a 1st order spline fit? This FEX submission would be applicable
  1 Comment
Michael
Michael on 20 Nov 2013
I think this is a complicated solution. Thank you though!

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