reclassify r1 to 1 and 0. reclassify r2 to 0 1 and 2. then multiply the rasters. so r1 becomes 0 for all values ecept 1. r2 is 1 or 2 or 0. and the product r3 will be 1 or 2 or 0 On Oct 17, 2012 11:55 AM, "aniruddha ghosh" <aniru...@gmail.com> wrote:
> 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 > > [[alternative HTML version deleted]] > > _______________________________________________ > R-sig-Geo mailing list > R-sig-Geo@r-project.org > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo
