[R] How to see how a function is written
eriki at ccbr.umn.edu
Tue Jun 15 14:51:16 CEST 2010
Sergey Goriatchev wrote:
> Erik, I see the following when I type "apply" at the prompt:
> standardGeneric for "apply" defined from package "base"
> function (X, MARGIN, FUN, ...)
> <environment: 0x03cad7d0>
> Methods may be defined for arguments: X, MARGIN, FUN
> Use showMethods("apply") for currently available ones.
> Also, whether I type "mean" at the prompt, or I type "edit(mean)", I
> do not see the underlying code for function "mean". How would I be
> able to see it?
> My machine:
> platform i386-pc-mingw32
> arch i386
> os mingw32
> system i386, mingw32
> major 2
> minor 10.1
> year 2009
> month 12
> day 14
> svn rev 50720
> language R
> version.string R version 2.10.1 (2009-12-14)
And what packages have you loaded? That *is* your current definition of apply,
I'm guessing some package is changing the base definition of 'apply', since
that's not what happens in my R --vanilla session. Regarding mean, you don't
show your output, but my guess is that it *is* printing the function definition,
which is generic. Try typing out mean.default and see what happens. What
happens when you type lm ?
More information about the R-help