On Tue, Aug 12, 2008 at 01:21:29AM -0700, dennis11 wrote: > > I want to create a vecor with frequencies. > > I have tried this: > > a <- c(1,1,1,1,2,3,4,5,5) > b <- table(a) > print (b[1]) > > which results in: > > print (b[1]) > 1 > 4 > > The only thing I want is the 4. > > So this seems obvious: > print (b[1,2])
No! The "1" is just a label. You're not looking at a matrix. (BTW, I think you meant b[2,1]). First I would say don't get rid of the "1" label unless you need to. It's just a label telling you what the count is referring to, and it wouldn't be there if there weren't a good reason for it. It won't interfere with any numeric calculations you do, e.g. > b[1] * 2 1 8 But if you really want to extract the integer counts from an object of class "table" you could do > as.vector(b) [1] 4 1 1 1 2 Remember that if an object is not behaving as you would expect, use str() and class() to see what you've really got: > class(b) [1] "table" > str(b) 'table' int [, 1:5] 4 1 1 1 2 - attr(*, "dimnames")=List of 1 ..$ a: chr [1:5] "1" "2" "3" "4" ... Dan > > but it does not work: > Error in b[1, 2] : incorrect number of dimensions > > How do I get a vector or how do I refer to the "4" without getting the "1" > label as well? > -- > View this message in context: > http://www.nabble.com/Frequency-vector-tp18939882p18939882.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. -- www.stats.ox.ac.uk/~davison ______________________________________________ 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.
