Bill Dunlap Spotfire, TIBCO Software wdunlap tibco.com
> -----Original Message----- > From: r-help-boun...@r-project.org > [mailto:r-help-boun...@r-project.org] On Behalf Of smu > Sent: Wednesday, November 11, 2009 7:58 AM > To: r-help@r-project.org > Subject: [R] partial cumsum > > Hello, > > I am searching for a function to calculate "partial" cumsums. > > For example it should calculate the cumulative sums until a > NA appears, > and restart the cumsum calculation after the NA. > > this: > > x <- c(1, 2, 3, NA, 5, 6, 7, 8, 9, 10) > > should become this: > > 1 3 6 NA 5 11 18 26 35 45 Perhaps > ave(x, rev(cumsum(rev(is.na(x)))), FUN=cumsum) [1] 1 3 6 NA 5 11 18 26 35 45 Bill Dunlap Spotfire, TIBCO Software wdunlap tibco.com > any ideas? > > thank you and best regards, > > stefan > > ______________________________________________ > 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.
