[R] StackRaster problem

[Jon Skoien]

Did you attach the raster package with library(raster)? It seems the 
newest version of dismo does not depend on raster, so you will not be 
able to use raster-functions if you only attach dismo.
This error message typically comes when R tries to use 
utils:::stack.default instead of the stack-function defined in the 
raster-package.

If this is not the case, please give the output from sessionInfo().

Cheers,
Jon

On 8/26/2014 3:21 PM, Guilherme Leite wrote:
> Hi,
>
> This is the process I want to do:
>
>> files <- list.files(path=paste(system.file(package="dismo"), '/ex',
> sep=''), pattern='grd', full.names=TRUE )
>
>> # The above finds all the files with extension "grd" in the
>> # examples ("ex") directory of the dismo package. You do not
>> # need such a complex statement to get your own files.
>
>> files
> [1] "d:/temp/Rtmp8Mttik/Rinst1fe4202d2ea5/dismo/ex/bio1.grd"
> [2] "d:/temp/Rtmp8Mttik/Rinst1fe4202d2ea5/dismo/ex/bio12.grd"
> [3] "d:/temp/Rtmp8Mttik/Rinst1fe4202d2ea5/dismo/ex/bio16.grd"
> [4] "d:/temp/Rtmp8Mttik/Rinst1fe4202d2ea5/dismo/ex/bio17.grd"
> [5] "d:/temp/Rtmp8Mttik/Rinst1fe4202d2ea5/dismo/ex/bio5.grd"
> [6] "d:/temp/Rtmp8Mttik/Rinst1fe4202d2ea5/dismo/ex/bio6.grd"
> [7] "d:/temp/Rtmp8Mttik/Rinst1fe4202d2ea5/dismo/ex/bio7.grd"
> [8] "d:/temp/Rtmp8Mttik/Rinst1fe4202d2ea5/dismo/ex/bio8.grd"
> [9] "d:/temp/Rtmp8Mttik/Rinst1fe4202d2ea5/dismo/ex/biome.grd"
>
>> predictors <- stack(files)
>> predictors
>
> class : RasterStack
> dimensions : 192, 186, 35712, 9 (nrow, ncol, ncell, nlayers)
> resolution : 0.5, 0.5 (x, y)
> extent : -125, -32, -56, 40 (xmin, xmax, ymin, ymax)
> coord. ref. : +proj=longlat +datum=WGS84 +ellps=WGS84 +towgs84=0,0,0
> names : bio1, bio12, bio16, bio17, bio5, bio6, bio7, bio8, biome
> min values : -23, 0, 0, 0, 61, -212, 60, -66, 1
> max values : 289, 7682, 2458, 1496, 422, 242, 461, 323, 14
>
> But what happen is:
>
>> files <- list.files(path=paste(system.file(package="dismo"), '/ex',
> sep=''), pattern='grd', full.names=TRUE )
>
>> files
>
> [1] "d:/temp/Rtmp8Mttik/Rinst1fe4202d2ea5/dismo/ex/bio1.grd"
> [2] "d:/temp/Rtmp8Mttik/Rinst1fe4202d2ea5/dismo/ex/bio12.grd"
> [3] "d:/temp/Rtmp8Mttik/Rinst1fe4202d2ea5/dismo/ex/bio16.grd"
> [4] "d:/temp/Rtmp8Mttik/Rinst1fe4202d2ea5/dismo/ex/bio17.grd"
> [5] "d:/temp/Rtmp8Mttik/Rinst1fe4202d2ea5/dismo/ex/bio5.grd"
> [6] "d:/temp/Rtmp8Mttik/Rinst1fe4202d2ea5/dismo/ex/bio6.grd"
> [7] "d:/temp/Rtmp8Mttik/Rinst1fe4202d2ea5/dismo/ex/bio7.grd"
> [8] "d:/temp/Rtmp8Mttik/Rinst1fe4202d2ea5/dismo/ex/bio8.grd"
> [9] "d:/temp/Rtmp8Mttik/Rinst1fe4202d2ea5/dismo/ex/biome.grd"
>
>> predictors <- stack(files)
> Error in rep.int(names(x), lapply(x, length)) : invalid 'times' value
>
> Do you know how to fix it?
>
> Thank you,
> Guilherme
>
> 	[[alternative HTML version deleted]]
>
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-- 
Jon Olav Skøien
Joint Research Centre - European Commission
Institute for Environment and Sustainability (IES)
Climate Risk Management Unit

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jon.skoien at jrc.ec.europa.eu
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