> ?mapply
> mapply('+', a, b, SIMPLIFY=FALSE)
> colSums(mapply('+', a, b))Hope this helps, -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare [EMAIL PROTECTED] (801) 408-8111 > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Yongwan Chun > Sent: Monday, September 03, 2007 12:36 AM > To: r-help@stat.math.ethz.ch > Subject: [R] element wise opertation between a vector and a list > > I want to try to get a result of element wise addition > between a vector and a list. It can be done with "for > statement." In order to reducing computing time, I have tried > to avoid "for state." If anybody give me an idea, I would > apprecite it much. > > for example, with a & b as below lines, > > a<- list(c(1,3),c(1,2),c(2,3)) > b<-c(10,20,30) > > I would like to have a list (like "d") or a vector (like "e") > as below. > > d<-list(c((1+10),(3+10)),c((1+20),(2+20)),c((2+30),(3+30))) > e<- c((1+10)+(3+10),(1+20)+(2+20),(2+30)+(3+30)) > > Thanks, > > > Yongwan Chun > > ______________________________________________ > 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.html > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ 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.html and provide commented, minimal, self-contained, reproducible code.
