Dear jholtman, The problem is that in this case, it seems that the blank is not replaced by NA according to the information I quote. It is replaced by blank. I have try: which(is.na(a$V4)), but get NA.
I want to delete the rows that have different format from others. jholtman wrote: > > In some cases the missing values have been replaced by NAs so you can look > for those. > > On Thu, Apr 30, 2009 at 9:28 AM, tedzzx <zengzhenx...@gmail.com> wrote: > >> >> Dear R users >> I am runing into a problem in reading data in R >> This is the error information >> >> a<-read.table("tt_mb_200409.txt",as.is=T) >> Error in scan(file, what, nmax, sep, dec, quote, skip, nlines, >> na.strings, >> : >> line 1653997 did not have 5 elements >> >> It seams that some lines don't have equal variables. I want to try >> >> > a<-read.table("tt_mb_200409.txt",as.is=T,fill=T) >> > a[1653997,] >> V1 V2 V3 V4 V5 >> 1653997 00992 2777010 >> >> But, I want to delect the rows that do not have the same number of >> variables >> with others, how can I do this? >> >> Many thanks >> >> Ted >> >> >> -- >> View this message in context: >> http://www.nabble.com/problem-in-reading-data-tp23316321p23316321.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<http://www.r-project.org/posting-guide.html> >> and provide commented, minimal, self-contained, reproducible code. >> > > > > -- > Jim Holtman > Cincinnati, OH > +1 513 646 9390 > > What is the problem that you are trying to solve? > > [[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. > > -- View this message in context: http://www.nabble.com/problem-in-reading-data-tp23316321p23327660.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.