[R] A way to list only variables or functions?

[Prof Brian Ripley]

What is a `variable'?  R has object,s some of which are function and all 
are variable or not depending where they are located.

On Mon, 21 Jun 2004, Shin, Daehyok wrote:

> Glad to know useful functions.
> How about adding lsv.str function to list only variables bound to values?
> In my opinion, we are more interested in values than functions in the
> process of data analysis.
> 
> In addition, the simple solution of Grothendieck to display only names of
> objects has its own practical value.
> 
> Daehyok Shin
> 
> > -----Original Message-----
> > From: Prof Brian Ripley [mailto:ripley at stats.ox.ac.uk]
> > Sent: Sunday, June 20, 2004 PM 12:03
> > To: Shin, Daehyok
> > Cc: r-help at stat.math.ethz.ch
> > Subject: RE: [R] A way to list only variables or functions?
> >
> >
> > On Sun, 20 Jun 2004, Shin, Daehyok wrote:
> >
> > > Neat! Thanks.
> >
> > Note that these are not correct, as the get is not done from the
> > correct environment.  The function ls.str I pointed you to is correct.
> >
> > > How about incorporating this support into standard commands, ls() or
> > > objects()?
> >
> > Well, there already is ls[f].str.
> >
> > > Daehyok Shin (Peter)
> > >
> > > > -----Original Message-----
> > > > From: Gabor Grothendieck [mailto:ggrothendieck at myway.COM]
> > > > Sent: Sunday, June 20, 2004 AM 10:06
> > > > To: sdhyok at email.unc.edu; r-help at stat.math.ethz.ch
> > > > Subject: RE: [R] A way to list only variables or functions?
> > > >
> > > >
> > > >
> > > >
> > > > These two functions will list the functions and variables
> > > > respectively:
> > > >
> > > > ls.funs <-
> > > > function(env=sys.frame(-1))unlist(lapply(ls(env=env),function(x)if
> > > > (is.function(get(x)))x))
> > > >
> > > > ls.vars <-
> > > > function(env=sys.frame(-1))unlist(lapply(ls(env=env),function(x)if
> > > > (!is.function(get(x)))x))
> > > >
> > > >
> > > > To use:
> > > >
> > > > ls.funs()
> > > > ls.vars()
> > > >
> > > >
> > > > Date:   Sat, 19 Jun 2004 22:59:57 -0400
> > > > From:   Shin <sdhyok at email.unc.edu>
> > > > To:   R Help <r-help at stat.math.ethz.ch>
> > > > Subject:   [R] A way to list only variables or functions?
> > > >
> > > >
> > > > I am curious if there is any way to list only variables or
> > functions in
> > > > current environment, rather than listing all objects? Thanks.
> > > >
> > > > --
> > > > Daehyok Shin (Peter)
> > > > Geography Department
> > > > Univ. of North Carolina-Chapel Hill
> > > >
> > > >
> > > >
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> >
> >
> 
> --
> 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 272866 (PA)
> Oxford OX1 3TG, UK                Fax:  +44 1865 272595
> 
> 
> 

-- 
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 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595