?commandArgs On Sat, Jan 3, 2009 at 4:17 PM, <mau...@alice.it> wrote: > Thank you. > You're right. I come from C and C++ programming. > I wonder whether to pass parameters to an R script I have to set environment > variables ... ? > > Best regards, > Maura > > > -----Messaggio originale----- > Da: jim holtman [mailto:jholt...@gmail.com] > Inviato: sab 03/01/2009 21.12 > A: mau...@alice.it > Cc: r-h...@stat.math.ethz.ch; r-help@r-project.org > Oggetto: Re: [R] passing parameters to an R script > > No you can not pass an address to a function. If you want to change > the value of something, then return it as a value and assign it to the > object so you can see what is going on. Must be coming from the "C" > environment where such things are allowed and lead to a number of > problems. > > If you really have your heart set to do it, look at the '<<-' operator > (or 'assign'), but use it with care. > > To retrieve environment values, use "Sys.getenv". > > On Sat, Jan 3, 2009 at 1:32 PM, <mau...@alice.it> wrote: >> I knowf R functions ca be called passing some parameters. >> My first question is: how are parameters passed to R functions ? >> Browsing through R archives I found an answer confirming taht parameters >> can >> be passed to the called function by value. I wonder whether passing the >> parameter >> address is possible somehow to allow the function to actually change its >> value. >> >> My second question is about running R scripts with parameters. Something >> similar to the >> s/w device (argc, argv) which is used to run a C program with initial >> parameters. >> Is this possible at all ? >> >> Thank you very much. >> Maura >> >> >> >> tutti i telefonini TIM! >> >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> 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. >> > > > > -- > Jim Holtman > Cincinnati, OH > +1 513 646 9390 > > What is the problem that you are trying to solve? > > > > Alice Messenger ;-) chatti anche con gli amici di Windows Live Messenger e > tutti i telefonini TIM! > Vai su http://maileservizi.alice.it/alice_messenger/index.html?pmk=footer
-- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem that you are trying to solve? ______________________________________________ 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.
