Dear List members,
I am trying to map the habitat suitability of Nephrops and one of my predictor
is a categorical variable.
However when I utilised the command "as.factor" (before to create my rasters
stack) I get the error message "Error in 1:ncol(r) : argument of length 0".
Could anyone help me?
> r4 <-
> raster("C:/POSTDOC/NEPHROPS_Habitat_Mapping/NEPHROPS_HabMod_PAPER1/Scotland/IN_eunis_sed.tif")
> plot(r4)
> is.factor(r4)
[1] TRUE
> as.factor(r4)
class : RasterLayer
dimensions : 250, 413, 103250 (nrow, ncol, ncell)
resolution : 0.01484784, 0.01484784 (x, y)
extent : -7.774709, -1.642552, 54.95371, 58.66567 (xmin, xmax, ymin, ymax)
coord. ref. : +proj=longlat +datum=WGS84 +no_defs +ellps=WGS84 +towgs84=0,0,0
data source :
C:\POSTDOC\NEPHROPS_Habitat_Mapping\NEPHROPS_HabMod_PAPER1\Scotland\IN_eunis_sed.tif
names : IN_eunis_sed
values : 1, 6 (min, max)
attributes :
Error in 1:ncol(r) : argument of length 0
> levels(r4)
[[1]]
ID OBJECTID Value Count sediment
0 1 1 2716 R
1 2 2 2249 CS
2 3 3 2647 MS
3 4 4 6819 M
4 5 5 889 MXS
5 6 6 3647 S
Thank you very much in advance.
Best Regards,
Valentina
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