(I do not know how to make Outlook send plain text, so I avoid apostrophes.)
For what it is worth, I agree with Mark Webster. The discussion by Ivan Krylov
is interesting, but if duplicated really treated a row name as part of the row
then any(duplicated(data.frame(�))) would always be FALSE. My
Hello Ivan, thanks for this.
> Part of the problem is that it's not obvious what should be a
> zero-column but non-zero-row data.frame mean.
>
> On the one hand, your database relation use case is entirely valid. On
> the other hand, if data.frames are considered to be tables of data with
> ro
Hello Mark,
В Fri, 5 Apr 2024 03:58:36 + (UTC)
Mark Webster via R-help пишет:
> I found what looks to me like an odd edge case for duplicated(),
> unique() etc. on data frames with zero columns, due to duplicated()
> returning a zero-length vector for them, regardless of the number of
> rows
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