Others gave you some examples using assign, which is the same information as in
the FAQ. But I expect that you will be better served by using a list (you can
use the paste function to create the names for the list elements) rather than
assign and global variables.
Something like:
mylist <- list()
for (i in c(1950, 1960, 1970) ) {
for (j in 1:12) {
mylist[[ paste( 'tmax.', i, j, sep='' ) ]] <- somefunction(i, j)
}
}
Then you can access a single result like:
mylist[['tmax.15012']]
or you can do something with all the output using something like:
sapply( mylist, summary )
hope this helps,
--
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.s...@imail.org
801.408.8111
> -----Original Message-----
> From: Panos Hadjinicolaou [mailto:p.hadjinicol...@cyi.ac.cy]
> Sent: Tuesday, August 10, 2010 6:07 AM
> To: Greg Snow; r-help@r-project.org
> Subject: RE: [R] Concatenate a mix of numbers and letters to create a
> vector name
>
> I was not aware of the R-FAQ, it seems to have some very useful tips,
> thanks for pointing there.
>
> Regarding the 7.21 in the FAQ, I read it a few times but it did not
> lead me anywhere. For the moment I am blaming my inexperience with some
> R basics, I will come back after I do some more serious studying.
>
> Thanks again,
>
> Panos
>
> --------------------------------------------------------
> Dr Panos Hadjinicolaou
>
> Energy Environment & Water Research Center (EEWRC)
> The Cyprus Institute
>
> ---------------------------------------------------------
>
>
> _____
> From: Greg Snow [mailto:greg.s...@imail.org]
> To: Panos Hadjinicolaou [mailto:p.hadjinicol...@cyi.ac.cy], r-h...@r-
> project.org [mailto:r-h...@r-project.org]
> Sent: Wed, 28 Jul 2010 00:39:41 +0300
> Subject: RE: [R] Concatenate a mix of numbers and letters to create a
> vector name
>
> This is a frequently asked/answered question (7.21 in the FAQ). What
> searching did you do and why did it not find this FAQ or previous
> discussion of it? How could the documentation/search/etc. be improved
> so that you (and the next n people with this question) will find the
> answer easier?
>
> The most important of part of the FAQ answer is the last section where
> it points out that using a list will be much simpler. You mentioned in
> the first post that you were doing this in a loop, just start with an
> empty list, use paste (or sprintf) to create the name, and then assign
> it as a new element of the list with that name (e.g. mylist[[
> sprintf('tmax.%d%d', var1, var2) ]] <- outputfromcomputations ).
>
> --
> Gregory (Greg) L. Snow Ph.D.
> Statistical Data Center
> Intermountain Healthcare
> greg.s...@imail.org
> 801.408.8111
>
> > -----Original Message-----
> > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-
> > project.org] On Behalf Of Panos Hadjinicolaou
> > Sent: Monday, July 26, 2010 8:24 AM
> > To: r-help@r-project.org
> > Subject: Re: [R] Concatenate a mix of numbers and letters to create a
> > vector name
> >
> > Thanks for the reply. Indeed the paste function results in
> > concatenation:
> > > paste(c("tmax.", 1950, 12), collapse="")
> > [1] "tmax.195012"
> >
> > but I am looking for a way to subsequently get rid of the - " - in
> > order to use tmax.195012 as an object (e.g. to define a vector with
> > that name). Any ideas?
> >
> > Thanks,
> >
> > Panos
> >
> > _____
> >
> > From: Dimitris Rizopoulos [mailto:d.rizopou...@erasmusmc.nl]
> > To: Panos Hadjinicolaou [mailto:p.hadjinicol...@cyi.ac.cy]
> > Cc: r-help@r-project.org
> > Sent: Mon, 26 Jul 2010 16:48:31 +0300
> > Subject: Re: [R] Concatenate a mix of numbers and letters to create a
> > vector name
> >
> > have a look at function paste(), i.e., ?paste
> >
> >
> > I hope it helps.
> >
> > Best,
> > Dimitris
> >
> >
> > On 7/26/2010 3:44 PM, Panos Hadjinicolaou wrote:
> > > Dear all,
> > >
> > > I am trying to create a vector name, for example tmax.195012 from
> > tmax., 1950 and 12. Obviously I don't wish to simply type it because
> > the 3 name components are changing in each iteration within a loop.
> Is
> > there any way of concatenating those 3 components (which are a
> mixture
> > of numbers and letters)?
> > >
> > > Thanks for reading,
> > >
> > > Panos
> > >
> > > -----------------------------------------------------------------
> > > Dr Panos Hadjinicolaou
> > >
> > > Energy Environment& Water Research Center (EEWRC)
> > > The Cyprus Institute
> > > -----------------------------------------------------------------
> -
> > > [[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.
> > >
> >
> > --
> > Dimitris Rizopoulos
> > Assistant Professor
> > Department of Biostatistics
> > Erasmus University Medical Center
> >
> > Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands
> > Tel: +31/(0)10/7043478
> > Fax: +31/(0)10/7043014
> > [[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.
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