Hoi Todd,
--On woensdag 16 juni 2004 10:18 -0400 Todd Ogden <[EMAIL PROTECTED]> wrote:
This just creates a vector of booleans that indicate (the row numbers) for which positions in dat Diagnosis==0.I'm puzzled by the following problem, which appears when attempting to run an analysis on part of a dataset:
If I try:
csubset <- dat$Diagnosis==0
This OTOH, uses the above vector to index the rows of dat, indeed selecting those rows from dat that have Diagnosis==0. This is assigned to cdat. You could have done
cdat <- dat[dat$Diagnosis==0,]
cdat <- dat[csubset,]
as well
HTH
-- Paul Lemmens NICI, University of Nijmegen ASCII Ribbon Campaign /"\ Montessorilaan 3 (B.01.05) Against HTML Mail \ / NL-6525 HR Nijmegen X The Netherlands / \ Phonenumber +31-24-3612648 Fax +31-24-3616066
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