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
>
> ______________________________________________
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>
--
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
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