Try this con <- gzfile("file.gz") a <- readLines(con, n=1) showConnections(all=TRUE) close(con) showConnections(all=TRUE)
So the connection is opened and closed as it says, but not destroyed. You do need to call close() explicitly -- from the help file 'close' closes and destroys a connection. ^^^^^^^^^^^^ There are 'create - open - close - destroy' states for a connection. On Thu, 25 Aug 2005, Ott Toomet wrote: > Hi everybody, > > I am using gzipped files quite extensively and cannot figure out how I > can close (or reuse) connections. > > Example: > >> for(i in 1:300) {cat(i, "\n"); a <- readLines(gzfile("file.gz"), n=1) } > 1 > 2 > ... > 46 > 47 > Error in gzfile("~/tyyq/andmebaasiq/ETU/ETU1997.tsv.gz") : > all connections are in use > > To use just gzfile without any open/close should be OK as the help > states: > > ... In general functions using connections will open them if they are not > open, but then close them again, so to leave a connection open call > open explicitly. > > I have also experimented with explicit open/close but without any more > success, though, R claims that the connections will be closed. > > Any ideas? Is it my misunderstanding? What exactly means a > connection is "in use"? -- 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