[R-sig-Geo] get() in raster ?
edzer.pebesma at uni-muenster.de
Sat Nov 20 12:25:39 CET 2010
Just pushed "send" too fast -- try without quotes to pass the objects
instead of their names:
v = list(r1, r2, r3)
On 11/20/2010 11:51 AM, Agustin Lobo wrote:
> ok, the problem is that, as noted by Carson,
> I must use get("v") and not get(v).
> But still have problems to use get() within stack() or brick():
>> r1 = raster(SM[,,1])
>> r2 = raster(SM[,,2])
>> r3 = raster(SM[,,3])
>> v = c("r1","r2","r3")
>  "r1" "r2" "r3"
>> bSM = brick(get(v))
> Error in .rasterObjectFromFile(x, objecttype = "RasterBrick", ...) :
> file: r1r2r3 does not exist
> Calls: brick -> brick -> .local -> .rasterObjectFromFile
> ( I'm trying to use get() because have to
> create a brick with 360 files that have been read as raster objects within
> a loop using assign() )
> 2010/11/19 Robert J. Hijmans <r.hijmans at gmail.com>:
>> This suggest that you have an object "r1" that is a Raster* object.
>> Perhaps because of a saved session?
>> Have you looked at
>> On Fri, Nov 19, 2010 at 1:24 PM, Agustin Lobo <alobolistas at gmail.com> wrote:
>>> Hi again!
>>> I'm having problems because cannot use get() from base once package
>>> raster has been installed:
>>>> v = c("r1","r2","r3")
>>>  "r1" "r2" "r3"
>>> Loading required package: raster
>>> Loading required package: sp
>>> raster version 1.6-22 (17-November-2010)
>>> class : RasterLayer
>>> nrow : 18
>>> ncol : 36
>>> ncell : 648
>>> projection : +proj=longlat +datum=WGS84 +ellps=WGS84 +towgs84=0,0,0
>>> xmin : -180
>>> xmax : 180
>>> ymin : -90
>>> ymax : 90
>>> xres : 10
>>> yres : 10
>>> Even not having loaded raster, it gets automatically loaded once I
>>> call get(). Is this a bug?
>>> In general, is there a way to force that, in case of conflict, you run
>>> a particular function from a given package?
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