On 12-04-04 4:52 PM, Sam Steingold wrote:
Since R has the same namespace for functions and variables,
c<- 1
kills the global function, which can be restored by
c<- get("c",mode="function")
Is there a way to prevent R from overriding globals
or at least warning when I do that
or at least warning when I replace a functional value with non-functional?
It doesn't kill it, it just hides it. You can still get the original by
telling R which one you want, e.g. base::c.
You'll get a warning when you do this in a package, e.g. library(Hmisc)
will tell you that it has hidden 5 functions from view.
There's no warning when you mask a function with a non-function at top
level, and little need for one, because R does the right search based on
the fact that you're making a function call:
> c
[1] 1
> c(1,2)
[1] 1 2
It only matters when you need to pass the function as an argument, e.g.
to one of the apply() family of functions.
Duncan Murdoch
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