[R-sig-Geo] long 0-360, shift to -180 to 180

[Andy Bunn]

I have a raster with longitude data over 0 to 360.

bar <- raster(t(foo[,,1]),xmn=0,xmx=356.25,ymn=-87.159094555863,ymx=87.159094555863,
              crs="+proj=longlat +datum=WGS84")

I'd like to shift those longitudes to -180 to 180. I tried paying with the +long_wrap argument to crs but to no avail. Can somebody help? I'll need to overlay and extract data from the negative side (e.g., 100W or -100) and it would be nice to have the coordinates the same.

Thanks in advance, 
Andy


> -----Original Message-----
> From: r-sig-geo-bounces at r-project.org [mailto:r-sig-geo-bounces at r-
> project.org] On Behalf Of Tom Gottfried
> Sent: Wednesday, March 09, 2011 1:40 PM
> To: r-sig-geo at r-project.org
> Subject: Re: [R-sig-Geo] predicting values from variofit function
> 
> Hi Anna,
> 
> Am 09.03.2011 21:25, schrieb Anna Gretschel:
> > Dear List,
> >
> > I have fitted a spherical function to my variogram using
> "variofit(...)"
> > from GeoR. Now I would like to predict some data with the function
> > "predict(object,...)" from package stats.
> 
> Note that predict() is a generic function (see
> http://cran.r-project.org/doc/manuals/R-intro.html#Object-orientation).
> I don't think there is a method in geoR that does what you want.
> 
> > Does anyone know wether this
> > works and if it does how to do it?
> 
> The package gstat has a method for objects of class gstat (see ?gstat,
> ?predict.gstat and the ASDAR book). You can coerce your variogram fit
> from geoR to the respective class used in package gstat with
> as.vgm.variomodel(). You can do kriging with krige.conv() from geoR
> too.
> But I think you have more options in gstat.
> 
> regards,
> Tom
> 
> >
> > Thanks a lot!
> > Anna
> >
> > _______________________________________________
> > R-sig-Geo mailing list
> > R-sig-Geo at r-project.org
> > https://stat.ethz.ch/mailman/listinfo/r-sig-geo
> 
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