hello Is it possible to execute Unix command from R prompt? for example ls cd .. In matlab this possible by adding "!" !ls !cd .. -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
Try something like:
R>system("ls")
Anders
On Mon, 6 Nov 2000, Meriema Belaidouni wrote:
> hello
> Is it possible to execute Unix command from R prompt?
> for example
> ls
> cd ..
>
> In matlab this possible by adding "!"
> !ls
> !cd ..
>
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Meriema Belaidouni <meriema at info.univ-angers.fr> writes:> ls > cd .. > > In matlab this possible by adding "!" > !ls > !cd ..Use system("ls"). We've had the "!" convention at some point, but as I remember it, people got tired of having it kick in unexpectedly where logical "not" was intended, and we decided that it was probably a bad idea to have a syntactically correct R expression do something completely different when it happened to sit at the beginning of a line... -- O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
Meriema Belaidouni <meriema at info.univ-angers.fr> writes:> hello > Is it possible to execute Unix command from R prompt? > for example > ls > cd ..system("ls") [...] Cheers Ross Darnell -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
Yes, you can use this:
system("date > date.txt")
for example
Meriema Belaidouni wrote:>
> hello
> Is it possible to execute Unix command from R prompt?
> for example
> ls
> cd ..
>
> In matlab this possible by adding "!"
> !ls
> !cd ..
>
>
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
> r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
> Send "info", "help", or "[un]subscribe"
> (in the "body", not the subject !) To: r-help-request at
stat.math.ethz.ch
>
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--
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Equipe Perception et Cognition Musicales http://www.ircam.fr/
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On Tue, 7 Nov 2000, Mark Myatt wrote:> Yves Gauvreau <cyg at sympatico.ca> writes: > >... and Matlab uses "ans" and Mathematica effectively uses %, %% > > > >Would be nice to have something simpler than .Last.value > > Perhaps I am stating the obvious or being extremely stupid but you can > create a function: > > lv <- function() > { > .Last.value > } > > And then use lv() whenever you need .Last.value.How do you say "give me the output I saw three steps ago?" In Mathematica you would use %%% or Out[-3]. Bill -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
ben at zoo.ufl.edu writes:> > [stack implementation] > > But if I could remember to push() every time I could remember to assign >everything to temporary variables anyway ...I suppose so. It might be possible to do an automatic push() on any assignment but that would create an enormous stack just retrieving a dataset or fitting a model. Mark -- Mark Myatt -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._