[R-sig-Geo] raster::stack() help

[Robert J. Hijmans]

My guess is that there is another package hiding the raster function
-- no messages? You could explicitly use raster::stack()
Also, this avoids the call and might be more efficient:

library(raster)
a.list <- list()
for (yr in seq(2000,2008)){
....
a.layer = raster(something).

a.list <- c(a.list, a.layer)
}

a.stack = stack(a.list)

Robert


On Tue, Jul 30, 2013 at 7:14 PM, Andrew Vitale <vitale232 at gmail.com> wrote:
> Works on my machine.
>
>> a.stack <- stack()
>> a.stack
> class       : RasterStack
> nlayers     : 0
>
>> stack()
> class       : RasterStack
> nlayers     : 0
>
>> sessionInfo()
> R version 3.0.1 (2013-05-16)
> Platform: x86_64-w64-mingw32/x64 (64-bit)
>
> 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] grid      stats     graphics  grDevices utils     datasets  methods
> base
>
> other attached packages:
>  [1] ncdf_1.6.6          rasterVis_0.21      hexbin_1.26.2
> latticeExtra_0.6-24 RColorBrewer_1.0-5
>  [6] lattice_0.20-15     rgdal_0.8-9         ncdf4_1.9
> raster_2.1-49       sp_1.0-11
>
> loaded via a namespace (and not attached):
> [1] tools_3.0.1 zoo_1.7-10
>>
>
>
> On Tue, Jul 30, 2013 at 10:14 AM, Dominik Schneider <
> Dominik.Schneider at colorado.edu> wrote:
>
>> Hi, I am trying to initialize an empty stack with
>>
>> require(raster)
>> a.stack <- stack()
>> for (yr in seq(2000,2008)){
>> ....
>> a.layer = raster(something).
>>
>> a.stack <- addLayer(a.stack, a.layer)
>> }
>>
>> Even if I just run a.stack <- stack() in the commandline:
>> > stack()
>> Error in as.list(x) : argument "x" is missing, with no default
>>
>> I know I've done this in the past and the help file for stack() says x can
>> be missing to create an empty stack. Could someone help me debug or suggest
>> a workaround?
>> Thanks
>> Dominik
>>
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>>
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>>
>
>
>
> --
> *Andrew P. Vitale*
> Masters Student
> Department of Geography
> University of Nevada, Reno
> (412) 915-3632
> vitale232 at gmail.com
>
>         [[alternative HTML version deleted]]
>
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