[R] problems with overlay of raster!

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

[R] install vegan

hoose.files("", filters = Filters[c("zip", : unable to install packages > utils:::menuInstallLocal() does anybody know what is wrong? Thanks in advance, Carolin __ R-help@r-project.org mailing list https://stat.ethz.ch/mailma