* On Wed 10:39AM, 02 Feb 2005, Prof Brian Ripley ([EMAIL PROTECTED]) wrote: > On Tue, 1 Feb 2005, Hsiu-Khuern Tang wrote: > > >Is there a limit on the number of characters in an invocation like > > > >R CMD BATCH --opt1=val1 --opt2=val2 ... --save-to=C:\very\long\string > >..\R\script.R > > > >? > > Yes, but that is not a valid invocation of R. > > >I am running R 2.0.1 on Windows XP, and when running a long BATCH > >command (about 400--500 characters) the last option gets mangled, as can > > There is a Windows limit on the length of command lines, and I believe you > have hit it. It looks like R.exe/Rcmd.exe were written assuming it is > MAX_PATH, hence about 260, which it used to be in Win95. > > You could use > > rterm --args --opt1=val1 --opt2=val2 ... --save-to=C:\very\long\string < > foo > bar > > instead: BATCH is just a convenient shorthand (and see the rw-FAQ for the > details).
Thank you! I tried this and it works (with the mandatory --save or --no-save). I also went back to the BATCH command and found that the truncation occurred at the 217th character after the "R" of R CMD BATCH. > > Shells also have limits, so check this for the one you used. > > >be seen from a warning in script.Rout that looks like this: > > > >WARNING: unknown option > >+--save-to=C:\very\long\str..\R\script.Rout > > > >Note that "string" is truncated to "str" _and_ concatenated with the > >implicit batch output file "..\R\script.Rout". (The "unknown option" > >warning is expected; I am just using commandArgs() within the script to > >pick out the arguments.) > > > >I have tried specifying --args before the options, with the same result, > >except that the truncation appears earlier. > > --args would be needed for this to make any sense. > > -- > 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 Best, Hsiu-Khuern. ______________________________________________ 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
