The situation arises where I open a file to write a data.frame to it. with write.table.
multiple lines are written to the file and the file is kept in Append=TRUE mode. If one sets the col.names to the names of the variables being written, you have output that looks like this... name1 name2 name3..... x x x x x x x x x name1 name2 name 3 x x x x x x x x x And so forth as each time write is called, the col.names are written. Setting col.names=NULL obviously removes them. I thought a simple solution would be to check for the file existence first and on the first write, include the col.names. with append=T. on subsequent writes, col.names would be set to NULL. that didnt work and threw warnings. Is there anyway to do this. basically open a file for writing, with append=TRUE and only write the col.names once at the first write. or am I stuck and forced to write the whole file without the col.names and then read back in and rewrite with col.names="the cols names I want" [[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.