On Jul 8, 2012, at 23:39 , ycyi121 wrote: > Hi, > > I have great difficulty in simulation the a dataset based in a loading > matrix [c(1,1,1,2,3,3,3,4,4,3,2,2,1,1), 7, 2) and an error covariance matrix > is 2*I. I have to simulate a dataset with 7 variables and 50 rows. I search > a lot and did find some information on this, for example, using rmvnorm(). > But I could do it. > > Please help! >
This looks like homework, and we don't do people's homework on this list. One hint though: You have in your textbook a formula that connects your loadings and errors to the 7x7 covariance matrix for observations. This is what you need in order to use rmvnorm(). > -- > View this message in context: > http://r.789695.n4.nabble.com/Data-Simulation-tp4635803.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. -- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Email: pd....@cbs.dk Priv: pda...@gmail.com ______________________________________________ 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.
