Date:         Tue, 16 Feb 2010 13:31:20 -0500
Reply-To:     Moshe Marko <MarkoM@upstate.edu>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         Moshe Marko <MarkoM@upstate.edu>
Subject:      Using IGRAPH to show results of a piecewise regression
Content-Type: text/plain; charset=US-ASCII

Hi all,

I am conducting a piecewise regression and am trying to create a graph to
show the differences in the slopes. Im am using the following syntax and it
tells me that there is an error - am I missing something? I copied the
syntax from http://www.ats.ucla.edu/stat/Spss/faq/piecewise.htm

compute Dependency = 0.
if HKAKIN60total ge 3 Dependency = 1.
exe.
igraph
 /x1 = var(HKAKIN60total) type = scale(min= -1 max = 6)
 /y = var(TotalMod) type = scale (min = 0 max = 42)
 /size var(Dependency) type = categorical
 /fitline method = regression linear line = meffect
 /catorder var(Dependency) (ascending values omitempty)
 /scatter coincident = none.

Moshe Marko, PT, DPT, MHS, OCS, CSCS
Assistant Professor
Department of Physical Therapy Education
College of Health Professions
SUNY Upstate Medical University
Room 2232  Silverman Hall
750 Adams Street
Syracuse, NY 13210-1834
315 464 6577
FAX 315 464 6887
markom@upstate.edu

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