using 'mask' versus 'crop' in raster
Seems like you may have some other function called mask either defined by you or in another package loaded after raster. A couple things you could check: -just type "mask" (without quotes) in the console. The first line should say something like: standardGeneric for "mask" defined from package "raster" -try raster::mask(ens, conus) to directly access mask in the raster package -Install and load the pryr package and run "pryr::where(mask)" (again, without quotes) to see which environment mask is located in
On Mon, Aug 10, 2015 at 10:56 AM, Travis Belote <tbelote at tws.org> wrote:
Hi all,
I am trying to extract a raster layer of data to a specific region defined
by a shapefile. In Arc I would do this using "extract by mask" and have had
some luck using "mask" in the raster package. I am able to consistently use
"crop" to limit the extent of the raster data, but I cannot consistently
use "mask." The projections of the raster and shapefile are the same. The
raster represents data for all of North America (called "ens" below) and I
am trying to extract just the data from the contiguous United States
(shapefile called "conus" below).
Here is the line of code and the Error message.
conusensMASK <- mask(ens, conus)
Error in mask(ens, conus) : unused argument (conus)
I was having trouble with this a few weeks ago. I updated all my packages
and that seemed to take care of the issue for a day when "mask" worked
beautifully. Again, "crop" works fine. But, I am again receiving the error
from "mask".
Thank you for any suggestions or advice.
Sincerely,
Travis
R. Travis Belote, PhD
Research Ecologist
The Wilderness Society
Bozeman, MT 59715
406.581.3808
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