>>>>> "Herve" == Herve Pages <[EMAIL PROTECTED]>
>>>>> on Mon, 26 Mar 2007 20:48:33 -0700 writes:
Herve> Hi,
>> dd <- data.frame(A=c("b","c","a"), B=3:1) dd
Herve> A B 1 b 3 2 c 2 3 a 1
>> unlist(dd)
Herve> A1 A2 A3 B1 B2 B3 2 3 1 3 2 1
Herve> Someone else might get something different. It all
Herve> depends on the values of its 'stringsAsFactors' option:
yes, and I don't like that (last) fact either.
IMO, an option should never be allowed to influence such a basic
function as data.frame().
I know I would have had time earlier to start discussing this,
but for some (probably good) reasons, I didn't get to it at the
time.
As Andy comments, everything is behaving as it should / is documented,
including the 'stringsAsFactors' option;
but personally, I really would want to consider changing
the default for data.frame()s stringAsFactors back (as
pre-R-2.4.0) to 'TRUE' instead of default.stringsAsFactors()
which is a smart version of getOption("stringsAsFactors").
I find it ok ("acceptable") if its influencing read.table()
but feel differently for data.frame().
Martin
>> dd2 <- data.frame(A=c("b","c","a"), B=3:1,
>> stringsAsFactors=FALSE)
>> dd2
Herve> A B 1 b 3 2 c 2 3 a 1
>> unlist(dd2)
Herve> A1 A2 A3 B1 B2 B3 "b" "c" "a" "3" "2" "1"
Herve> Same thing with as.character:
>> as.character(dd)
Herve> [1] "c(2, 3, 1)" "c(3, 2, 1)"
>> as.character(dd2)
Herve> [1] "c(\"b\", \"c\", \"a\")" "c(3, 2, 1)"
Herve> Bug or "feature"?
Herve> Note that as.character applied directly on dd$A
Herve> doesn't have this "feature":
>> as.character(dd$A)
Herve> [1] "b" "c" "a"
>> as.character(dd2$A)
Herve> [1] "b" "c" "a"
Herve> Cheers, H.
Herve> ______________________________________________
Herve> R-devel@r-project.org mailing list
Herve> https://stat.ethz.ch/mailman/listinfo/r-devel
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