R help - Jan 2012 - Error using qda on the spambase training dataset

Hello,
  I am trying to run the code for quadratic discriminant analysis with the
Spambase data set following the code example in the book "R in a
Nutshell"
by Joseph Adler (page 443).
  The line of code: 
                                   > spam.qda <- qda(formula=is_spam~.,
data=spambase.training)

  gives me an error:
                                     Error in qda.default(x, grouping, ...)
: rank deficiency in group 1

  (There really is a "tilde" after is_spam in the code, only on this
web-page it appears as a hyphen :)
  Can someone please tell me why it does not work with me but appears to do
so in the book? I am using R version 2.13.0.

  Thanks,
    Ravi

--
View this message in context:
http://r.789695.n4.nabble.com/Error-using-qda-on-the-spambase-training-dataset-tp4269941p4269941.html
Sent from the R help mailing list archive at Nabble.com.