Hi Martin, Try
x=c(NA,NA,rnorm(50),NA) sum(!is.na(x)) HTH Jorge On Thu, Mar 6, 2008 at 11:41 AM, Martin Kaffanke <[EMAIL PROTECTED]> wrote: > Hi there, > > When i do > > mean(fl[1:20], na.rm=T) > sd(fl[1:20], na.rm=T) > > I get 20 Results, but now I'd like to know from how many numbers my mean > and sd are calculated. > > How to I use the length() for this, or is this possible? > > Because there are missing values in some, but not in all columns. So > there should be a different count of numbers. > > Thanks, > Martin > > -- > Ihr Partner für Webdesign, Webapplikationen und Webspace. > http://www.roomandspace.com/ > Martin Kaffanke +43 650 4514224 > > ______________________________________________ > 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.
