Dear Amarnath Bose, There's nothing obviously wrong with the commands that you report -- in fact, your commands have the same structure as the multigroup SEM example in ?sem -- so the usual advice about including reproducible code producing the error applies. If you like, you could send me your data and the complete R script that you used.
Best, John ----------------------------------------------- John Fox Senator McMaster Professor of Social Statistics Department of Sociology McMaster University Hamilton, Ontario, Canada > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of Amarnath Bose > Sent: Thursday, May 23, 2013 6:54 AM > To: r-help@r-project.org > Subject: [R] SEM: multigroup model > > Dear R Gurus, > > I am trying to run a multigroup SEM using Prof. John Fox's SEM package. > > The two groups are "Ready to Eat" denoted by RTE and > "Ready to Cook" denoted by RTC. > > I ran a omnibus CFA on the data of consumer perceptions & preferences > and > am satisfied with what I got. > > When I tried to do a multigroup SEM - my understanding is limited to > the > SEM manual in CRAN - using the code below, I get the following message: > Error in summary.msemObjectiveML(sem.MG) : > no 'dimnames' attribute for array > Execution halted > > The relevant part of my code follows: > mod.mg <- multigroupModel(sbmod.cfa,groups=c("RTC","RTE")) > > sem.MG <- sem(mod.mg,data=srt,group="RTind", > formula = ~ inv + imp + tch + emo + loy + usg + sig + dif + > ndif > + > vda + vdb + vdc + vdd + vde + vdf + vdg + vdh + > riskT + riskP + riskS + riskFi + riskFu + riskPs > > ) > summary(sem.MG) > > I was expecting two sets of fit indices for RTE & RTC and want to do an > ANOVA > across the models; as well as possibly check for loading equivalence. > > Can somebody please throw some light on where I am making a mistake? > > Thanks > Amarnath Bose > -- > > > *Amarnath Bose* > * **Associate Professor * > *Decision Sciences Department* > *Birla Institute of Management Technology > * > Tel: +91 120 2323001 - 10 Ext.: 398 > Cell: +91 9873179813 > > [[alternative HTML version deleted]] > > ______________________________________________ > 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.
