[R-sig-Geo] get() in raster ?

[Agustin Lobo]

Thanks,
Kind of weird, isn't it?
I don't understand the behavior of get() in your case either. I would
expect get(v) just returning the value of v, not going down to evaluate r1

And you remind me I should have posted the result
of sessionInfo():

> v <- c("r1","r2","r3")
> get(v)
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
> str(v)
 chr [1:3] "r1" "r2" "r3"
> sessionInfo()
R version 2.12.0 (2010-10-15)
Platform: i486-pc-linux-gnu (32-bit)

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C
 [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8
 [5] LC_MONETARY=C              LC_MESSAGES=en_US.UTF-8
 [7] LC_PAPER=en_US.UTF-8       LC_NAME=C
 [9] LC_ADDRESS=C               LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] raster_1.6-22 sp_0.9-72

loaded via a namespace (and not attached):
[1] grid_2.12.0     lattice_0.19-13
>



2010/11/19 Matthew Landis <landis at isciences.com>:
> On 11/19/2010 2:24 PM, Agustin Lobo wrote:
>>
>> Even not having loaded raster, it gets automatically loaded once I
>> call get(). Is this a bug?
>
> Agus, that doesn't occur for me.  Here's what happens on my machine (and I
> do have raster installed, but not loaded).   Note the difference in behavior
> between get(v) and get('v') .
>
>> v = c("r1","r2","r3")
>> v
> [1] "r1" "r2" "r3"
>> get(v)
> Error in get(v) : object 'r1' not found
>> get('v')
> [1] "r1" "r2" "r3"
>> sessionInfo()
> R version 2.11.1 (2010-05-31)
> x86_64-pc-mingw32
>
> locale:
> [1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United
> States.1252
> [3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C
> [5] LC_TIME=English_United States.1252
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base
>
> loaded via a namespace (and not attached):
> [1] tools_2.11.1
>
>
> --
> ~~~~~~~~~~~~~~~~~~~~~~~~~~
> Matthew Landis, Ph.D.
> Research Scientist
> ISciences, LLC
> 61 Main St. Suite 200
> Burlington VT 05401
> 802.864.2999
> ~~~~~~~~~~~~~~~~~~~~~~~~~~
>
>