I do not get an error with R-3.2.1 on Mac OS. You may have done something prior to this code so that perhaps F is not FALSE or T is not TRUE.
R. Mark Sharp, Ph.D. msh...@txbiomed.org > On Jul 27, 2015, at 3:32 PM, Waichler, Scott R <scott.waich...@pnnl.gov> > wrote: > > Hi, > > For years I've been writing text to the beginning of files with cat(append=F) > , then following that text with data written by write.table(append=T). It is > now giving me an error message. I'm using R-3.1.2. What gives? > > df <- data.frame(x = 1, y = 1:10, z = 10:1) > cat(file="junk.txt", sep="", "# An introductory note.\n") > write.table(df, file="junk.txt", sep=",", append=T, quote=F, row.names=F, > col.names=F) > > Error in file(file, ifelse(append, "a", "w")) : invalid 'open' argument > > Thanks, > Scott Waichler > Pacific Northwest National Laboratory > Richland, WA USA > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
