Hi Martin, '--no-echo'
....or.... '--no_echo' Obviously you may prefer the first, but I hope you might consider the second. Best Regards, W. Michels, Ph.D. On Fri, Sep 27, 2019 at 9:04 AM Martin Maechler <maech...@stat.math.ethz.ch> wrote: > > >>>>> Martin Maechler > >>>>> on Mon, 23 Sep 2019 16:14:36 +0200 writes: > > >>>>> Richard O'Keefe > >>>>> on Sat, 21 Sep 2019 09:39:18 +1200 writes: > > >> Ah, *now* we're getting somewhere. There is something > >> that *can* be done that's genuinely helpful. > >>> From the R(1) manual page: > >> -q, --quiet Don't print startup message > > >> --silent Same as --quiet > > >> --slave Make R run as quietly as possible > > >> It might have been better to use --nobanner instead of > >> --quiet. So perhaps > > >> -q, --quiet Don't print the startup message. This is > >> the only output that is suppressed. > > >> --silent Same as --quiet. Suppress the startup > >> message only. > > >> --slave Make R run as quietly as possible. This is > >> for use when running R as a subordinate process. See > >> "Introduction to Sub-Processes in R" > >> https://cran.r-project.org/web/packages/subprocess/vignettes/intro.html > >> for an example. > > > Thank you, Stephen and Richard. > > > I think we (the R Core Team) *can* make the description a bit > > more verbose. However, as practically all "--<foo>" descriptions > > are fitting in one short line, (and as the 'subprocess' package is just > an > > extension pkg, and may disappear (and more reasons)) I'd like to > > be less verbose than your proposal. > > > What about > > > -q, --quiet Don't print startup message > > > --silent Same as --quiet > > > --slave Make R run as quietly as possible. For use when > > runnning R as sub(ordinate) process. > > > If you look more closely, you'll notice that --slave is not much > > quieter than --quiet, the only (?) difference being that the > > input is not copied and (only "mostly") the R prompt is also not > printed. > > > And from my experiments (in Linux (Fedora 30)), one might even > > notice that in some cases --slave prints the R prompt (to stderr?) > > which one might consider bogous (I'm not: not wanting to spend > > time fixing this platform-independently) : > > > --slave : > > ------------------------ > > > MM@lynne$ echo '(i <- 1:3) > > i*10' | R-3.6.1 --slave --vanilla > >> [1] 1 2 3 > > [1] 10 20 30 > > MM@lynne$ f=/tmp/Rslave.out$$; echo '(i <- 1:3) > > i*10' | R-3.6.1 --slave --vanilla | tee $f > >> [1] 1 2 3 > > [1] 10 20 30 > > MM@lynne$ cat $f > > [1] 1 2 3 > > [1] 10 20 30 > > > --quiet : > > ------------------------ > > > MM@lynne$ f=/tmp/Rquiet.out$$; echo '(i <- 1:3) > > i*10' | R-3.6.1 --quiet --vanilla | tee $f > >> (i <- 1:3) > > [1] 1 2 3 > >> i*10 > > [1] 10 20 30 > >> > > MM@lynne$ cat $f > >> (i <- 1:3) > > [1] 1 2 3 > >> i*10 > > [1] 10 20 30 > >> > > MM@lynne$ > > > ------------------------ > > > But there's a bit more to it: In my examples above, both --quiet > > and --slave where used together with --vanilla. In general > > --slave *also* never saves, i.e., uses the equivalent of > > q('no'), where as --quiet does [ask or ...]. > > > Last but not least, from very simply reading R's source code on > > this, it becomes blatant that you can use '-s' instead of '--slave', > > but we (R Core) have probably not documented that on purpose (so > > we could reserve it for something more important, and redefine > > the simple use of '-s' some time in the future ?) > > > So, all those who want to restrict their language could use '-s' > > for now. In addition, we could add >> one << other alias to > > --slave, say --subprocess (or --quieter ? or ???) > > and one could make that the preferred use some time in the future. > > > Well, these were another two hours of time *not* spent improving > > R technically, but spent reading e-mails, source code, and considering. > > Maybe well spent, maybe not ... > > > Martin Maechler > > ETH Zurich and R Core Team > > With in the R Core Team we have considered the issue. > > As a consequence, I have committed a few minutes ago code changes > that replace '--slave' by '--no-echo' . > [This will be in R-devel versions from svn rev 77229 and of > course in the "big step" release around April 2020]. > > Among other considerations, we found that '--no-echo' was > really much more self-explaining, as indeed the command line > option turns off the echo'ing of the R code that is executed, > and on the C level is indeed very much related to R level > > options(echo = "no") > > For back compatibility reasons, the old command line option will > continue to work so the many shell and other scripts that use > it, will not stop working. > > > Best regards, > Martin Maechler > ETH Zurich and R Core Team > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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 -- To UNSUBSCRIBE and more, see 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.
