f [ f < 0 ]
On Wed, May 8, 2013 at 11:54 AM, jpm miao <miao...@gmail.com> wrote: > Hi, > > I have a vector f with some negative columns. I remember that there is > an easy expression that can find out negative items. Can someone tell me > how I can do it? > > It seems to be > f[i such that f[i]<0 ...] > > Thanks, > > Miao > > > d<-1:7 > > f<-(-2)^d > > f > [1] -2 4 -8 16 -32 64 -128 > > [[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. > [[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.
