Hello everyone, I am new to SAS, although I have used Program R a little in the past.  I need to run a piecewise regression/multi-phase regression for a data set that will have either two or three linear segments, and is continuous.  I don't know which, but it will be one of the two.  I believe I need to use PROC NLIN to accomplish this, but don't know how to set up the code for the two potential break points.  I have attached a dummy data set.  Could one of you be so kind as to help walk me through the code for this?  I am interested in finding the break point or points, and the adj. r^2.   I appreciate your time,  Thank you, Tim Muhich ... View more