Windows Vista
R 2.10 - I know it is old, I will update later today.
How might I perform a piece-wise linear regression where two linear segments
are separated by a single knot? In addition to estimating the slopes of the two
segments (or the slope in one segment and the difference between the slope of
the first and second segment), I would like the analysis to select the optimum
knot. My first analysis will contain a single dependent and a single
independent variables. Subsequent analyses will add additional independent
variables to determine the effect on the results of adjusting for potential
confounding.
Thank you,
John
John David Sorkin M.D., Ph.D.
Chief, Biostatistics and Informatics
University of Maryland School of Medicine Division of Gerontology
Baltimore VA Medical Center
10 North Greene Street
GRECC (BT/18/GR)
Baltimore, MD 21201-1524
(Phone) 410-605-7119
(Fax) 410-605-7913 (Please call phone number above prior to faxing)
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