Drawing a straight line to a linear part of curve

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KB
KB 2015-10-3
回答： dpb 2015-11-1
Hello All, it would be very helpful if someone can help me out with drawing a straight line to the linear part of the curve in attached figure. I want to know the intercept value to the x-axis.

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dpb
dpb 2015-11-1
Looks like piecewise regression to the rescue again...it has been the subject of some of my previous postings, one quite recent...
find-diverging-point-of-two-arrays
Having solved for the breakpoint, you'll also have the coefficients of the two line segments which can be readily used individually.

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