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
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