Hello all, I have an issue where I am generating data and trying to confirm the estimates using a sem. I keep getting an error about the degree of freedom being negative "Error in sem.default(ram, S = S, N = N, raw = raw, data = data, pattern.number = pattern.number, : The model has negative degrees of freedom = -6"
Can someone explain this error or tell me what is wrong with my model? Thank you. Here is the code: model.ram1 <- specifyModel() UNIT -> Y1, ty,0.3 UNIT -> Z1, tz1,-0.1 UNIT -> Z2, tz2,0.1 CF -> Y1, lamy,0.5 CF -> Z1, lamz1,0.85 CF -> Z2, lamz2,0.2 UNIT -> CF, k Y1 <-> Y1, psi3, NA Z1 <-> Z1, psi1, NA Z2 <-> Z2, psi2, NA CF <-> CF,vCF1,NA sem.m1<-sem(model=model.ram1,S=S2,N=500,fixed.x="UNIT",raw=T) -- I.J. Williams Ph.D. Student in Education Measurement and Statistics Statistics MS Mathematics BS Rutgers University [[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.