Thanks for the clarifcation, Duncan. Best,
B On Nov 22, 2007, at 8:32 PM, Duncan Murdoch <[EMAIL PROTECTED]> wrote: > On 22/11/2007 8:11 PM, Benilton Carvalho wrote: >> well, >> choose(n, k) should actually return: >> factorial(n)/(factorial(n-k)*factorial(k)) > > That's not how the docs define it. They say > > Note that 'choose(n,k)' is defined for all > real numbers n and integer k. For k >= 1 as n(n-1)...(n-k+1) / > k!, as 1 for k = 0 and as 0 for negative k. > > which agrees with your definition only for 0 <= k <= n. > > Duncan Murdoch > >> R-2.6.0 works just fine for me.... so does R-2.5.1.... so does >> R-2.4.1.... >> b >> On Nov 22, 2007, at 8:04 PM, Luis Salasar wrote: >>> Hi, >>> >>> I have used the function choose(n, k) sometimes, and i realized >>> that it doesn't work properly for n < 0. For example, if one >>> tries choose(-1, 3), it should be returned the value (-1)^3 = -1, >>> since choose (-1, 3) = (-1)*(-2)*(-3)/3! = (-1)^3, but indeed R >>> returns the value 0. I am using R version 2.5.1, it don't know if >>> this little bug has already been solved in the new version. Thanks, >>> >>> Luis Ernesto. >>> >>> >>> --------------------------------- >>> >>> [[alternative HTML version deleted]] >>> >>> ______________________________________________ >>> 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. >> ______________________________________________ >> 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. ______________________________________________ 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.
