Hi Julios,

I think that best solution is you read your shape and store on a object
(choose a good name for the object). After you can
save.image("object_name.rda").

When you need your object again you can read it using
load("object_name.rda").

But I think in a function is not possible.

Bests

milton

On Tue, Aug 11, 2009 at 12:18 AM, Julius Tesoro <jutesoro@yahoo.com> wrote:

> Hi
>
> I would like to store shapefiles in a function such that when accessing the
> xy coordinates or any attribute of a shapefile, you dont have to read the
> shapefile all over again. How do I read it once and then store it within a
> function?
>
>
> Cheers,
>
> Julius Tesoro
>
> --- On Sat, 8/8/09, r-sig-geo-request@stat.math.ethz.ch <
> r-sig-geo-request@stat.math.ethz.ch> wrote:
>
> > From: r-sig-geo-request@stat.math.ethz.ch <
> r-sig-geo-request@stat.math.ethz.ch>
> > Subject: R-sig-Geo Digest, Vol 72, Issue 6
> > To: r-sig-geo@stat.math.ethz.ch
> > Date: Saturday, August 8, 2009, 6:00 PM
> > Send R-sig-Geo mailing list
> > submissions to
> >     r-sig-geo@stat.math.ethz.ch
> >
> > To subscribe or unsubscribe via the World Wide Web, visit
> >     https://stat.ethz.ch/mailman/listinfo/r-sig-geo
> > or, via email, send a message with subject or body 'help'
> > to
> >     r-sig-geo-request@stat.math.ethz.ch
> >
> > You can reach the person managing the list at
> >     r-sig-geo-owner@stat.math.ethz.ch
> >
> > When replying, please edit your Subject line so it is more
> > specific
> > than "Re: Contents of R-sig-Geo digest..."
> >
> >
> > Today's Topics:
> >
> >    1.  inverse distance with
> > covariables using gstat (Tobias Vetter)
> >    2. about a variogram (Marcia Mu?oz)
> >    3. Re: about a variogram (Tobias Vetter)
> >    4. [Report #11] Kriging with GRASS and R:
> > v.autokrige port to
> >       wxPython and more (Anne Ghisla)
> >
> >
> > ----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Fri, 07 Aug 2009 14:01:47 +0200
> > From: Tobias Vetter <vetter@pik-potsdam.de>
> > Subject: [R-sig-Geo]  inverse distance with
> > covariables using gstat
> > To: "r-sig-geo@stat.math.ethz.ch"
> > <r-sig-geo@stat.math.ethz.ch>
> > Message-ID: <4A7C17AB.3080104@pik-potsdam.de>
> > Content-Type: text/plain; charset=ISO-8859-15;
> > format=flowed
> >
> > I would like to do inverse distance interpolation with
> > Trend removal.
> >
> >
> > When doing:
> > gstat(formula=z~Co,data=values,newdata=grid,nmax=10)
> >
> >   will gstat first remove  the trend and then
> > interpolate using inverse
> > distance?
> >
> > Here is the output I got:
> > [ordinary or weighted least squares prediction]
> >
> >
> >
> > ------------------------------
> >
> > Message: 2
> > Date: Fri, 7 Aug 2009 12:37:05 -0400
> > From: Marcia Mu?oz <marcarmu@gmail.com>
> > Subject: [R-sig-Geo] about a variogram
> > To: "r-sig-geo@stat.math.ethz.ch"
> > <r-sig-geo@stat.math.ethz.ch>
> > Message-ID:
> >     <4d0b5e4f0908070937x389cb87cyc06092da730545a5@mail.gmail.com>
> > Content-Type: text/plain; charset="utf-8"
> >
> > Dear all,
> >
> >
> >
> > I want to show this variograma to you and ask about the
> > meaning.  These are
> > data of abundance of a tree species in the forest. I took
> > the values
> > (abundance = # individuals) and transformed this abundance
> > with root square
> > (to minimize the variance) for each point. I have 520 point
> > from the forest,
> > many of them with zero because the species was absent. This
> > variogram means
> > that there is no spatial pattern?. I fitted this variogram
> > with corSphere or
> > corRatio models to get these parameters, range and nugget.
> > I choose a model
> > with base on Akaike Information Criterion (AIC). I would
> > like to use these
> > values (range) for my results, but I do not known if I am
> > doing right this.
> > I just want to hear your opinion.
> >
> >
> >
> > Thanks a lot for your help
> >
> >
> >
> > Mar
> >
> >
> > --
> > Marcia C. Mu?oz
> > Universidad de Puerto Rico
> > Departamento de Biologia - FB246
> > POBOX 23360
> > San Juan, PR 00931-3360
> > tel: 787-7640000, 2900
> > -------------- next part --------------
> > An HTML attachment was scrubbed...
> > URL: <
> https://stat.ethz.ch/pipermail/r-sig-geo/attachments/20090807/e21be400/attachment-0001.html
> >
> > -------------- next part --------------
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> > URL: <
> https://stat.ethz.ch/pipermail/r-sig-geo/attachments/20090807/e21be400/attachment-0001.jpeg
> >
> >
> > ------------------------------
> >
> > Message: 3
> > Date: Fri, 07 Aug 2009 18:48:53 +0200
> > From: Tobias Vetter <vetter@pik-potsdam.de>
> > Subject: Re: [R-sig-Geo] about a variogram
> > To: Marcia Mu?oz <marcarmu@gmail.com>
> > Cc: "r-sig-geo@stat.math.ethz.ch"
> > <r-sig-geo@stat.math.ethz.ch>
> > Message-ID: <4A7C5AF5.5000009@pik-potsdam.de>
> > Content-Type: text/plain; charset=UTF-8; format=flowed
> >
> > It would be another possibilty to convert the data into
> > classes.
> > Simplest way:  0  if the species is missing and 1
> > if existing .
> > >
> > > Dear all,
> > >
> > >
> > >
> > > I want to show this variograma to you and ask about
> > the meaning.
> > > These are data of abundance of a tree species in the
> > forest. I took
> > > the values (abundance = # individuals) and transformed
> > this abundance
> > > with root square (to minimize the variance) for each
> > point. I have 520
> > > point from the forest, many of them with zero because
> > the species was
> > > absent. This variogram means that there is no spatial
> > pattern?. I
> > > fitted this variogram with corSphere or corRatio
> > models to get these
> > > parameters, range and nugget. I choose a model with
> > base on Akaike
> > > Information Criterion (AIC). I would like to use these
> > values (range)
> > > for my results, but I do not known if I am doing right
> > this. I just
> > > want to hear your opinion.
> > >
> > >
> > >
> > > Thanks a lot for your help
> > >
> > >
> > >
> > > Mar
> > >
> > >
> > >
> > > --
> > > Marcia C. Mu?oz
> > > Universidad de Puerto Rico
> > > Departamento de Biologia - FB246
> > > POBOX 23360
> > > San Juan, PR 00931-3360
> > > tel: 787-7640000, 2900
> > >
> > >
> > ------------------------------------------------------------------------
> > >
> > >
> > ------------------------------------------------------------------------
> > >
> > > _______________________________________________
> > > R-sig-Geo mailing list
> > > R-sig-Geo@stat.math.ethz.ch
> > > https://stat.ethz.ch/mailman/listinfo/r-sig-geo
> > >
> >
> >
> >
> > ------------------------------
> >
> > Message: 4
> > Date: Fri, 07 Aug 2009 20:18:40 +0200
> > From: Anne Ghisla <a.ghisla@gmail.com>
> > Subject: [R-sig-Geo] [Report #11] Kriging with GRASS and
> > R:
> >     v.autokrige port to wxPython and more
> > To: OSGeo SoC <soc@lists.osgeo.org>,
> > grass-dev@lists.osgeo.org,
> >     r-sig-geo@stat.math.ethz.ch,
> > grass-stats@lists.osgeo.org,
> > gfoss italia
> >     <gfoss@faunalia.com>
> > Message-ID: <4A7C7000.7040908@gmail.com>
> > Content-Type: text/plain; charset=ISO-8859-15
> >
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > Hello all and sorry for cross-posting,
> >
> > this week I worked on error handling by GUI, adding
> > controls on input
> > data and parameters and hiding Run and Plot buttons unless
> > all options
> > are suitable.
> > Variogram plotting is on its way - I discarded matplotlib
> > to avoid
> > further dependencies, in favour of wx.lib.plot.
> >
> > best regards,
> >
> > Anne
> >
> >
> > -----BEGIN PGP SIGNATURE-----
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> >
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> > iqwAoJ7jaz6XMiIuZMOZnMBvfdIlt0nX
> > =2VfU
> > -----END PGP SIGNATURE-----
> >
> >
> >
> > ------------------------------
> >
> > _______________________________________________
> > R-sig-Geo mailing list
> > R-sig-Geo@stat.math.ethz.ch
> > https://stat.ethz.ch/mailman/listinfo/r-sig-geo
> >
> >
> > End of R-sig-Geo Digest, Vol 72, Issue 6
> > ****************************************
> >
>
>
>
>
> _______________________________________________
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