Message-ID: <CAC+VNxrROj_mwdZSmgZUXKhVte5DkuDNP8j3a0fnHQKO2S9FYQ@mail.gmail.com>
Date: 2011-11-01T15:40:16Z
From: Aidin Niamir
Subject: Problem with raster calculation
Dear all
I am experiencing a strange problem when calculating in the raster package.
Let me explain it with a simple example;
> a <- c(1,1,1,0,0,0,2,2,2)
> a <- matrix(a,3,3,byrow=T)
> a <- raster(a)
> a []
[1] 1 1 1 0 0 0 2 2 2
> b <- 10 - a
> b []
[1] ?-9 ?-9 ?-9 -10 -10 -10 ?-8 ?-8 ?-8
As you can see, the obtained values are not correct. I cannot see why
this should be.
Can anybody help?
Aidin Niamir