Hi everyone.
What's going on here?
> a <- matrix(1:4,2,2)
> a
[,1] [,2]
[1,] 1 3
[2,] 2 4
> apply(a,2,sum)
[1] 3 7
> apply(a,2,"+")
[,1] [,2]
[1,] 1 3
[2,] 2 4
> apply(a,1,"+")
[,1] [,2]
[1,] 1 2
[2,] 3 4
>
help(apply) says that "+" should be quoted but is otherwise silent on
unary operators. I don't understand apply() here at all.
anyone?
--
Robin Hankin, Lecturer,
School of Geography and Environmental Science
Tamaki Campus
Private Bag 92019 Auckland
New Zealand
[EMAIL PROTECTED]
tel 0064-9-373-7599 x6820; FAX 0064-9-373-7042
______________________________________________
[EMAIL PROTECTED] mailing list
https://www.stat.math.ethz.ch/mailman/listinfo/r-help
