Dear List,
I have two raster layers (r1 and r2) and the cells have values ranging 1 to
10. I want to create a new raster layer from these two with different
conditions like:
1) if r1==1 and r2==1, then r3 should be 1
2) if r1==1 and r2==2, then r3 should be 2
else 0 etc

With the following example:

m1<-matrix(c(1,1,1,2,2,2,3,3,3),ncol=3,byrow=TRUE)
m2<-matrix(c(1,2,1,1,2,3,2,3,3),ncol=3,byrow=TRUE)
r1<-raster(m1)
r2<-raster(m2)
Here, r1[1,1]=1 and r2[1,1]=1, so for the new raster, [1,1] should be 1,
r1[1,2]=1 and r2[1,2]=2, so for the new raster, [1,2] should be 2,
all other cells which don't satisfy the above criteria should be zero.

I tried with "calc" in raster package but the attempt was not successful.

Looking forward to your suggestions!


Thanks
-- 
Ani

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