Which part of the read-eval-print loop loop ("REPL loop") do you need?source(file, print=TRUE) gives you the printing part, which is what I usually want. Opening a file connection and repeatedly calling parse(n=1) gives you the read part, > tf <- tempfile() > cat(file=tf, sep="\n", "x <- 1 +", "10 ; y <- 2:7", "10:3") > f <- file(tf, open="rt") > parse(f, n=1) expression(x <- 1 + 10) > parse(f, n=1) expression(y <- 2:7) > parse(f, n=1) expression(10:3) > parse(f, n=1) expression() > close(f) and you can copy the code from source() to get the eval and print stuff right. Bill Dunlap Spotfire, TIBCO Software wdunlap tibco.com > -----Original Message----- > From: r-devel-boun...@r-project.org [mailto:r-devel-boun...@r-project.org] On > Behalf > Of Marc Aurel Kiefer > Sent: Tuesday, February 26, 2013 2:08 AM > To: r-devel@r-project.org > Subject: [Rd] Running R scripts with interactive-style evaluation > > Hi, > > when running a R-script like this: > > enable_magic() > compute_stuff() > disable_magic() > > the whole script is parsed into a single expression and then evaluated, > whereas when > using the interactive shell after each line entered, a REPL loop happens. > > Is there a way to make a script evaluation behave like this, because I need a > single REPL > iteration for every expression in the script. > > It doesn't matter if it's a source()-like way or "R CMD BATCH" or even > feeding stdin to R > or whatever... > > Regards, > > Marc > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
