On Fri, Sep 25, 2009 at 10:18 AM, Henrik Bengtsson <h...@stat.berkeley.edu> wrote: > You can use R.utils (on CRAN) to help you figure out why the file is > not found or not readable. > > library("R.utils"); > pathname <- C:/Documents and Settings/ashta/My Documents/R_data/rel.dat"; > pathname <- Arguments$getReadablePathname(pathname); > rel <- read.table(pathname, quote="", header=FALSE, sep="", > col.names=c("id","orel","nrel")); > > If the file is not found it gives an error an tries to tell you why, e.g. > >> Arguments$getReadablePathname("C:/Windows/system32/cmd.exe") > [1] "C:/Windows/system32/cmd.exe" > >> Arguments$getReadablePathname("C:/Windows/system323/cmd.exe") > Error in list(`Arguments$getReadablePathname("C:/Windows/system323/cmd.exe")` > = > <environment>, : > > [2009-09-25 10:11:57] Exception: Pathname not found: > C:/Windows/system323/cmd.exe (C:/Windows/ exists, but nothing beyond) > at throw(Exception(...)) > at throw.default("Pathname not found: ", pathname, reason) > at throw("Pathname not found: ", pathname, reason) > at method(static, ...) > at Arguments$getReadablePathname("C:/Windows/system323/cmd.exe") > > It will also tell you if the file exists, but you don't have the > permission to read it. > > > Second, your error message reports on a pathname that starts with > 'file=', which I've never seen; > > cannot open file 'file=C:/Documents and > Settings/sewalem/MyDocuments/R_data/rel.dat': Invalid argument > > what version of R are you use, i.e. what does sessionInfo() give?
Did you *really* do? rel <- read.table("C:/Documents and Settings/sewalem/MyDocuments/R_data/rel.dat", quote="", header=FALSE, sep="", col.names=c("id","orel","nrel")) or did you try to do: rel <- read.table(file="C:/Documents and Settings/sewalem/MyDocuments/R_data/rel.dat", quote="", header=FALSE, sep="", col.names=c("id","orel","nrel")) but wrote? rel <- read.table("file=C:/Documents and Settings/sewalem/MyDocuments/R_data/rel.dat", quote="", header=FALSE, sep="", col.names=c("id","orel","nrel")) /H > > > Third, it is true that backslashes need to be escaped. However, > *forward-slashes* work with *any > platform*. I stick with the latter so I don't have to think about it. > It should make no difference in your case. > > > My $.02 > > /Henrik > > On Fri, Sep 25, 2009 at 7:32 AM, Michael A. Miller <mmill...@iupui.edu> wrote: >> Sometimes it is easiest to open a file using a file selection >> widget. I keep this in my .Rprofile: >> >> getOpenFile <- function(...){ >> require(tcltk) >> return(tclvalue(tkgetOpenFile())) >> } >> >> With this you can find your file and open it with >> >> rel <- read.table(getOpenFile(), quote="", header=FALSE, sep="", >> col.names=c("id","orel","nrel")) >> >> or >> >> filename <- getOpenFile() >> rel <- read.table(filename, quote="", header=FALSE, sep="", >> col.names=c("id","orel","nrel")) >> >> Mike >> >> >> P.S. I keep a couple functions on hand for choosing writable files >> and directories too... >> >> getSaveFile <- function(...){ >> require(tcltk) >> return(tclvalue(tkgetSaveFile())) >> } >> >> chooseDir <- function(...){ >> require(tcltk) >> return(tclvalue(tkchooseDirectory())) >> } >> >> ______________________________________________ >> 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. >> > ______________________________________________ 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.