Birgit Lemcke wrote: > Hello! > > I am using R 2.5.1 on a Apple Power Book G4 with Mac OS X 10.4.10 and > I am still R beginner. > > I try to calculate a t.test() using this code: > > TTest75<-t.test(Fem75, Mal75, alternative= "two.sided", paired= TRUE) > > This works properly, but I have two variables with a lot of missing > data and therefore get the error message: > > TTest66<-t.test(Fem66, Mal66, alternative= "two.sided", paired= TRUE) > Fehler in var(x) : 'x' ist leer > > One of the two vectors looks like this: > > [1] 5.0 NA 4.5 6.0 0.8 NA 7.0 4.5 NA NA NA NA 5.0 NA 6.0 NA > 5.0 NA 5.0 8.0 NA NA NA 8.0 NA 8.0 5.0 NA NA NA NA 8.0 NA 1.0 > [35] NA NA NA NA NA NA 5.0 NA 4.0 8.0 NA 6.0 6.0 4.5 3.5 NA > NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA > [69] NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA .... >
> Is it possible to run a TTest inspite of all the missing data? > I really need two know if may two vectors are significantly > different. (If this results are then reliable is an other question) > Well, you're not showing the other one, but I have a hunch that any(complete.cases(Fem66, Mal66)) will come out false, in which case you don't have paired data and might get rid of paired=TRUE and have an ordinary two sample test. (BTW paired data for females and males? Couples?) > By the way is there a better possibility (and I guess there is) to > save or export the t.test() results as textfile? > > Thanks in advance for your help. > > Greetings > > Birgit > > Birgit Lemcke > Institut für Systematische Botanik > Zollikerstrasse 107 > CH-8008 Zürich > Switzerland > Ph: +41 (0)44 634 8351 > [EMAIL PROTECTED] > > > > > > > [[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. > -- O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ 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.