[R] Output args?
cyg at sympatico.ca
Fri Jun 9 13:05:42 CEST 2000
Thanks for the prompt response.
I know nothing about S and about the fact that it is a functional language.
I don't know much about English, functional languages, stats and maths
either I'm just a retired high school teacher fiddling around to pass the
time. But I know that when someone doesn't know something it only means that
this someone doesn't know this subject and it certainly doesn't mean that
this someone is necessarily stupid.
I find out by trial and error later that you can do the following.
there is nothing outputted to the console which is close to what I ask in
the first part of my query. I'll continue investigating to learn if it's
possible to export or whatever is the right term, the variables I want so
that there available for future use at the top level.
----- Original Message -----
From: "Prof Brian D Ripley" <ripley at stats.ox.ac.uk>
To: "Yves Gauvreau" <cyg at sympatico.ca>
Cc: <r-help at stat.math.ethz.ch>
Sent: Friday, June 09, 2000 1:15 AM
Subject: Re: [R] Output args?
> On Thu, 8 Jun 2000, Yves Gauvreau wrote (after adding some line breaks):
> > Is there a way to find out if a function was called with an
> > output argument? Or to prevent the printing of large amount of data if
> > the function was called without output argument?
> and later:
> > I forgot to ask if it was possible when there is no output argument to
> > somehow "put" the data in the global environnement?
> I think you misunderstand. S is a functional language, so *all* functions
> return something (possible NULL). And if an object is evaluated at the
> top-level and is not part of an assignment, its result is *printed* unless
> the auto-print flag is false. If you don't want to see the result, either
> enclose the call in invisible() or assign the result to an R object, as in
> > 2+3
>  5
> > invisible(2+3)
> > z <- 2+3
> (BTW, "+" really is a function in S, and I could have written "+"(2,3)
> to show this.)
> I hope I have guessed correctly what you had in mind.
> Brian D. Ripley, ripley at stats.ox.ac.uk
> 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 272860 (secr)
> Oxford OX1 3TG, UK Fax: +44 1865 272595
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