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sibley
2003 Jan 14
1
comparing class() -- R=NULL and S+=numeric
I'm just reading Modern Applied Statistics with S, 4th Ed., Venables and
Ribley
I'm typing in their examples in both R and S+. I need insight in the
difference
in the class() statement shown in Chap. 2. Example from book:
> names(powers.of.pi) <- -2:2
> powers.of.pi
-2 -1 0 1 2
0.1013212 0.3183099 1.0000000 3.1415927 9.8696...