[Rd] I() in merge (was: Re: xftrm is more than 100x slower for AsIs than for character vectors)

2024-07-18 Thread Kurt Hornik
> Hilmar Berger via R-devel writes: Thanks. I just removed the I() as suggested. Best -k > Dear all, > actually, it is not clear to me why there is still a protection of the > added Row.names column in merge using I(). This seems to stem from a > time when R would automatically convert char

[Rd] I() in merge (was: Re: xftrm is more than 100x slower for AsIs than for character vectors)

2024-07-16 Thread Hilmar Berger via R-devel
Dear all, actually, it is not clear to me why there is still a protection of the added Row.names column in merge using I(). This seems to stem from a time when R would automatically convert character vectors to factor in data.frame on insert. However, I can't reproduce this behaviour even in data