To delete duplicate rows, use unique(TAB1): see its help page. It looks to me as if the names are missing values NA and *not* start with NA. If so, you want to use
TAB1[!is.na(TAB1$Name), ] Otherwise, perhaps TAB1[substr(TAB1$Name, 1, 2) == "NA", ]. On Wed, 27 Jul 2005, Michael Graber wrote: > Dear R-users, > > I am very new to R, so maybe my question is very easy to answer. > I have the following table: > TAB1<-data.frame(Name,Number), "Name" and "Number" are all character > strings, > it looks like this: > > Name Number > > ab 2 > > ab 2 > > NA 15 > > NA 15 > > NA 15 > > cd 3 > > ef 1 > > NA 15 > > NA 15 > > gh 15 > > gh 15 > > I want to delete all the rows which begin with "NA" > and all the rows where names are duplicates > (for example the second row). > I have tried this, but I only get numbers: > > for (i in 1:ZeileMax ) {if ( TAB1[[1]] [i] != "NA" ) > {cat(TAB1[[1]][i],file = "Name.txt",fill= TRUE,append = TRUE ,sep = > "");cat(TAB1[[2]][i], file="Number.txt", fill=TRUE,append=TRUE, sep="")}} > Name<-readLines("Name.txt") > Number<-readLines("Number.txt") > TAB<-data.frame(Name,Number) > > > Thanks in advance, > > > > Michael Graber > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html > -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html