Finding the break in data from a piecewise function

Question

Greetings,

I'm performing research that will help determine the size of observed space and the time elapsed since the big bang. Hopefully you can help!

I have bilinear data on which I want to perform two linear regressions. There is a point at which the slope and intercept change, and I need to (write a program to) find this point.

Thoughts?

Might see if [Colt](http://acs.lbl.gov/software/colt/api/index.html) would be useful to you — Brad Mace, Dec 22 '10 at 06:55
Match the data from the two ends with least squares. If you have decent data, your point will be by the intersection — Dr. belisarius, Dec 22 '10 at 07:03
You might also look at Total Variation filtering of the gradient image. — , Apr 15 '11 at 09:56

score 0 · Answer 1 · answered Mar 07 '11 at 19:30

0

There was a paper on this a few years ago by Joo and Qiu at Minnesota: http://pubs.amstat.org/doi/pdf/10.1198/tech.2009.07163

answered Mar 07 '11 at 19:30

Rick

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Finding the break in data from a piecewise function

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