Dear Bjørn-Helge Mevik: Thank you so much (!!) for your speedy help. This works perfectly, no fuss. My understanding of data.frames is still fuzzy, so I knew it was some flaw in my understanding.
I enjoyed your very informative writeups on the package in JSS and R-News; they told me a lot about the method and its objectives. Would you have any suggestions on 'primers' for data.frames (particularly the indexing and cbind())? I've gone through the Introduction to R (which is a bit too terse for my comfort) as well as the package writeup for lm (which you have tried to emulate in your pls interface) but I still don't really 'get it'. Thanks again for your help on this Chris 2012/2/21 Bjørn-Helge Mevik <b.h.me...@usit.uio.no> > westland <westl...@uic.edu> writes: > > > Here is what I have done: > > > > I read in an 10000 x 8 table of data, and assign the first four columns > to > > matrix A and the second four to matrix B > > > > pls <- read.table("C:/Users/Chris/Desktop/SEM Book/SEM Stat > > Example/Simple Header Data for SEM.csv", header=TRUE, sep=",", > > na.strings="NA", dec=".", strip.white=TRUE) > > The problem is here: > > > A <- c(pls[1],pls[2],pls[3],pls[4]) > > B <- c(pls[5],pls[6],pls[7],pls[8]) > > This creates lists A and B, not data frames. > > Either use cbind() instead of c(), or simply say > > A <- pls[,1:4] > B <- pls[,5:8] > > The the rest should work. > > Btw. it is probably a good idea to avoid single-character names for > variables. Especially c and C, because they are names of functions in R. > > -- > Regards, > Bjørn-Helge Mevik > > ______________________________________________ > 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. > -- J. Christopher Westland Professor, Information & Decision Sciences, University of Illinois - Chicago 601 S. Morgan Street (UH2400) Chicago, IL 60607-7124 Telephone +1.312.860.0587 Google Voice +1.209.757.8849 westl...@uic.edu http://uic.edu/~westland [[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.