(e-mailing to R-bugs is intentional - the web itnerface seems to
be down)
> a<- cbind(c(1,2), c(3,4))
> a
[,1] [,2]
[1,] 1 3
[2,] 2 4
> a[cbind(c(2,2), c(2,1))]
[1] 4 2
> a[cbind(c(2,3), c(2,1))]
Error: subscript out of bounds
> a[cbind(c(2,-1), c(2,1))]
Error: negative values are not allowed in a matrix subscript
> a[cbind(c(2,0), c(2,1))]
[1] 4
Am somewhat surprised that 2,0 just silently skip over and doesn't
throw an error like 2,0 and 2,-1 . Surely it should throw
an error about subscript should be >= 1?
> sessionInfo()
R version 2.4.1 (2006-12-18)
i686-redhat-linux-gnu
locale:
LC_CTYPE=en_GB.UTF-8;LC_NUMERIC=C;LC_TIME=en_GB.UTF-8;LC_COLLATE=en_GB.UTF-8;LC_MONETARY=en_GB.UTF-8;LC_MESSAGES=en_GB.UTF-8;LC_PAPER=en_GB.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_GB.UTF-8;LC_IDENTIFICATION=C
attached base packages:
[1] "splines" "stats" "graphics" "grDevices" "utils" "datasets"
[7] "methods" "base"
other attached packages:
snpMatrix survival
"1.0.4" "2.30"
>
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