On 22/11/2007 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,
You're right. There's some code to optimize the k <= 30 case and it doesn't take n < 0 into account. I'll fix it. Duncan Murdoch ______________________________________________ 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.
