Thank you Jonathan. I do need to read R documentation. The extra problem is time .... Thank you for your reply.
2006/7/4, Jonathan Baron <[EMAIL PROTECTED]>: > On 07/04/06 19:51, Guo Wei-Wei wrote: > > Can I use the variance-covariance matrix as the input data? Just like > > what SEM does. My mentor told me to avoid sperate the operation into > > two step, that is to get the factors' means first and then to test the > > relationships. I'm used to use sem package. I'm not familiar with > > lm(). I trid summary(lm(B ~ A*C)) and failed to get any result. > > > > Can sem deal with mediation? And could you tell me the command of > > generating a interaction item of A (nxp) and C (mxp)? > > I don't use sem, but I don't see why you need it for this. This > is a simple regression problem, so far as I can tell. > > I think you need to do some reading of the R documentation. What > are A, B, and C? They should be vectors. That was the point of > my comment about rowMeans. > > You seem to be guessing and relying on authority instead of > trying to understand. > > -- > Jonathan Baron, Professor of Psychology, University of Pennsylvania > Home page: http://www.sas.upenn.edu/~baron > > ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
