data.frame(...) not constructing "1:n" row.names [diff. S <--> R]
Peter Dalgaard BSA
16 Jan 1998 19:34:20 +0100
Martin Maechler <firstname.lastname@example.org> writes:
> [I think Doug Bates has already alluded to this, somewhere..]
> In R, data.frame( ... )
> does not construct row.names whereas in S, it does:
> R core: Is there a good reason for this?
> Well (as a member of R-core, I give my answer):
> Memory efficiency can be a good reason, actually...
> together with ``cleanness'' :
> ``1:n'' are the IMPLICIT DEFAULT row.names
> We could stay at the current way `internally',
> but make sure that all functions working on data.frames `d.f'
> automatically work as if
> row.names(d.f) *was indeed* == paste(1:nrow(d.f)
Ugh. Please, let's avoid implicit stuff. All the special-casing
involved all over the place would soon outweigh the saved storage of a
character vector. We'll get nothing but trouble from it. Just add the
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
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