Hi all,
I 'm doing the exercise given in the 'SDM with R' (Robert J. Hijmans and Jane
Elith), chapter 4.2, regarding extracting values . I tried to do the same using
my own data as well. Each cases i received the following error message ;
"Error in .xyValues(x, as.matrix(y), ...) : xy should have 2 columns only.
Found these dimensions:
Can some body explain me how to get rid of that? Thanks in advance.
champika
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