> -----Original Message----- > From: r-help-boun...@r-project.org > [mailto:r-help-boun...@r-project.org] On Behalf Of anna > Sent: Friday, January 22, 2010 8:56 AM > To: r-help@r-project.org > Subject: [R] Counting Na values on a time serie only on the past datas > > > Hello everyone, I have a time serie of n values, some are > na's. I want to get > a vector of size n whose elements represent on the time t < n > the number of > missing values between o and t. I know I can do it with a > loop but I wanted > to know if there was a function or a special syntax to do > this. Thanks a > lot!
If x is your vector of numbers then cumsum(is.na(x)) should give what you want. You didn't show sample data so here is my example > x <- c(101,102,NA,104,NA) > cumsum(is.na(x)) [1] 0 0 1 1 2 Bill Dunlap Spotfire, TIBCO Software wdunlap tibco.com > -- > View this message in context: > http://n4.nabble.com/Counting-Na-values-on-a-time-serie-only-o n-the-past-datas-tp1101617p1101617.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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.
