[R] re coercing data frame rows to character: Am I right that this is a bug?

andrewH ahoerner at rprogress.org
Fri Oct 21 08:48:44 CEST 2011


Dear Folks--
All this seems to me to behave the way you expect, recognising that column b
is a factor:
> AA <- data.frame(a=3:4, b=c('x', 'y'))
> AA[1,]
  a b
1 3 x
> as.numeric(AA[1,])
[1] 3 1
> AA[,2]
[1] x y
Levels: x y
> as.numeric(AA[,2])
[1] 1 2
> as.character(AA[,2])
[1] "x" "y"

But this seems to me to be wrong:
> as.character(AA[1,])
[1] "3" "1"

Shouldn't it be:
[1] "3" "x"
to be consistant with the normal pattern of coercing factors to character
values?
If it is a bug, is this the right place to post it?

sincerely, andrewH

--
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