Try ths: Alive <- sum(deaths) - cumsum(deaths)
On Tue, Sep 1, 2009 at 3:48 PM, Frostygoat <frostyg...@gmail.com> wrote: > > Hello, > > For insect mortality data I'm trying to get an R script that will take > the data from the raw form and convert it to Lx (% survival) for a > number of treatments. The raw data has the number of days lived for > each individual for the respective treatment. Thus, for example, when > R selects the data for a single treatment I end up with the following > vectors: > > >day=seq(from=0,to=6) > >deaths=c(0,0,2,0,0,1,6) > > where deaths is the number of deaths on a given day. Now I need to > create a new vector with the number alive for each day and this is > where I'm stuck... I've tried to work various for and while loops but > haven't had success. The vector should be: > > >Alive=c(9,9,7,7,7,6,0) > > I realize it is a very basic problem that is easily accomplished in > one's head or on a spreadsheet but in the context of the size of the > data set I wish to have R do it for me. I would welcome any > suggestions please. > > Best regards. > > ______________________________________________ > 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. > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O [[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.
