From: Anon. <bob.ohara_at_helsinki.fi>

Date: Thu 25 Aug 2005 - 21:45:46 EST

Date: Thu 25 Aug 2005 - 21:45:46 EST

I'm sure I'm missing something obvious here, but I can't find the
solution (including in the FAQ etc.).

I have a vector of names of variables like this: NRes.x.y. where x and y are numbers. I want to extract these numbers as numbers to use elsewhere. I can extract the numbers as a list of characters using strsplit(), and convert that to a data frame, e.g.:

NAMES=c("NRes.1.2.", "NRes.1.3.", "NRes.1.4.", "NRes.1.5.", "NRes.1.6.") NUMBERS=strsplit(gsub("NRes.","", NAMES, perl =T), '.', fixed = TRUE) NUMBERS.df=t(data.frame(NUMBERS))

But I now want to convert the characters to be numeric. Using as.numeric(NUMBERS.df) converts them, but to a vector. How can I convert and keep as a data frame? I could use this:

matrix(as.numeric(NUMBERS.df), ncol=dim(NUMBERS.df)[2])

but I seem to be jumping through far too many hoops: there must be an easier way. An suggestions?

Bob

-- Bob O'Hara Department of Mathematics and Statistics P.O. Box 68 (Gustaf Hällströmin katu 2b) FIN-00014 University of Helsinki Finland Telephone: +358-9-191 51479 Mobile: +358 50 599 0540 Fax: +358-9-191 51400 WWW: http://www.RNI.Helsinki.FI/~boh/ Journal of Negative Results - EEB: www.jnr-eeb.org ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.htmlReceived on Thu Aug 25 21:51:21 2005

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