Plotting a line which would include 95% of points above and below the regression line

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I have used the segmented regression method to plot linear lines over my scatter plot. Now I want to draw a line parallel to the segmented regression line, both above and below (+ & -), which would include approximately 90-95% of the points.
Can anybody help me with this? thank you

Accepted Answer

Ahmet Cecen
Ahmet Cecen on 14 Nov 2016
Find your residual vector.
Use prctile() on the residual vector to find the points at your upper and lower bounds.
Solve the equation BoundY = Slope*BoundX + Location, for Location.
Plot the lines with both the upper and lower bound Locations.

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