[Rd] An artifact of base being namespace

[Saikat DebRoy]

Function in the base library of R 1.8.0 seems to use a search path with 
base coming before the local environment. I think this is intentional 
and is related to base being a namespace.

> log <- function(x, base) 200
> log(1)
[1] 200
> log10
function (x)
log(x, 10)
<environment: namespace:base>
> log10(1)
[1] 0
>
This is most problematic when you are creating a generic for an 
existing function in base (as you very well could for log). This often 
makes the ability to make new generics out of existing functions 
somewhat useless.

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