[R] problems with overlay of raster!

Carolin caroline.judith at ymail.com
Fri Jun 22 16:00:05 CEST 2012


Hi,
I am trying to overlay to raster but I always got this warning message:
> test<-overlay(raster1,raster2,fun=function(x,y){x*y})
Warning message:
In x * y : longer object length is not a multiple of shorter object length

Here are the general information about my raster layer
raster1
class       : RasterLayer 
dimensions  : 421, 465, 195765  (nrow, ncol, ncell)
resolution  : 0.0002727273, 0.0002727273  (x, y)
extent      : -71.23787, -71.11105, 8.530567, 8.645386  (xmin, xmax, ymin,
ymax)
coord. ref. : NA 
values      : C:\Users\Khaeg\Desktop\5Zonen1206020\rr3.asc 
layer name  : rr3 
min value   : -2147483648 
max value   : 2147483647

raster2
class       : RasterLayer 
dimensions  : 341, 391, 133331  (nrow, ncol, ncell)
resolution  : 0.000272, 0.000272  (x, y)
extent      : -71.22967, -71.12332, 8.542734, 8.635486  (xmin, xmax, ymin,
ymax)
coord. ref. : NA 
values      : C:\Users\Khaeg\Desktop\5Zonen1206020\class_agg.asc 
layer name  : class_agg 
min value   : -2147483648 
max value   : 2147483647

I do not have much experience in using R that’s why I would really
appreciate your help.

Thank you!


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