On Sat, 21 Apr 2007, Vaibhav Gathibandhe wrote: > Hi Prof Brian, > > Thanks for the solution. > > cbind() certainly works in this example, but it won't work in my case. > I m doing bootstrap and generating lots of data (2 x 10 power 6). > I tried to create this much big matrix but my machine won't let me do it. > In cbind() also, the situation will be the same, the difference is that the > bit matrix will be formed at the end. > > That's why i need some way through which i can properly append to the file > and don't have to create big matrix which i can't.
No one said you needed to create the whole matrix before writing (which you seem to be assuming we did say), but you do need to create all of a row before writing that row: that is a property of sequential files. You need to think through the data representation you want on that file: a flat ASCII file by rows does not seem a good enough fit. > On 4/20/07, Prof Brian Ripley <[EMAIL PROTECTED]> wrote: >> >> The output is >> >> "","V1","V2","V3" >> "1",0,0,0 >> "2",0,0,0 >> "","V1","V2","V3" >> "1",1,1,1 >> "2",1,1,1 >> >> and the warning is because no csv-reader is going to make much sense of >> that. >> >> You want col.names=FALSE on the second call. >> >> >> On Fri, 20 Apr 2007, Vaibhav Gathibandhe wrote: >> >> > Hello R-Experts, >> > >> > I am a beginner to R. Can someone please look at my problem >> > >> > I am trying to append the files in R but couldn't get the answer >> properly. >> > >> > My code is >> > >> > mat1<-matrix(0,2,3) >> > mat2<-matrix(1,2,3) >> > >> > write.table(mat1,"foo.csv",sep=",",col.names=NA) >> > write.table(mat2,"foo.csv", sep=",", col.names=NA, append = TRUE) >> > >> > I am getting a warning message: >> > >> > Warning message: >> > appending column names to file in: write.table(mat2, "foo.csv", sep = >> ",", >> > col.names = NA, append = TRUE) >> > >> > Moreover the data of *mat2* is getting appended to "foo.csv" in the >> > following way >> > >> > V1 V2 V3 1 0 0 0 2 0 0 0 V1 V2 V3 1 1 1 1 2 1 1 >> 1 >> > >> > If data is getting appended then why I am getting the warning message? >> > >> > Moreover is there any way by which i can get the data of *mat2* beside >> the >> > data of *mat1* instead of below? >> >> Not by appending to a file. You can use cbind() in R. >> >> > >> > >> > Thanks and Regards, >> > Vaibhav Gathibandhe >> > >> > [[alternative HTML version deleted]] >> > >> > ______________________________________________ >> > [email protected] 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. >> > >> >> -- >> 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 >> > -- 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 ______________________________________________ [email protected] 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.
