Don't know but perhaps you could just use each of: contr.helmert, contr.poly, contr.sum, contr.treatment, contr.SAS in turn on the R side until you get one that matches. Once you find out adding a contr.SPSS to R might be nice.
On Sat, Oct 11, 2008 at 3:31 PM, Ted Harding <[EMAIL PROTECTED]> wrote: > Hi Folks, > > I'm comparing some output from R with output from SPSS. > The coefficients of the independent variables (which are > all factors, each at 2 levels) are identical. > > However, R's Intercept (using default contr.treatment) > differs from SPSS's 'constant'. It seems that the contrasts > were set in SPSS using > > /CONTRAST (varname)=Simple(1) > > I can get R's Intercept to match SPSS's 'constant' if I use > contr.sum in R. > > Can someone please confirm that that is a correct match for > the SPSS "Simple(1)", with identical effect? > > And is there a convenient on-line reference where I can look > up what SPSS's "/CONTRAST" statements exactly mean? > I've done a lot of googling, withbout coming up with anything > satisfactory. > > With thanks, > Ted. > > -------------------------------------------------------------------- > E-Mail: (Ted Harding) <[EMAIL PROTECTED]> > Fax-to-email: +44 (0)870 094 0861 > Date: 11-Oct-08 Time: 20:31:53 > ------------------------------ XFMail ------------------------------ > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
