hi, Am Dienstag, 8. Februar 2011, um 10:42:52 schrieb Thomas Friedrichsmeier: > I'll split the issues, and reply to the last one, first.
yes, that's better, sorry for the compressed content, it grew while writing...
> > i was first surprised that the editor still shows factor levels
>
> Yes, the idea was to support "value labels" on data types other than
> factors, similar to e.g. SPSS. Think of likert-scales for a use case where
> data is "numeric" (not in IRT, of course), but end-points are named. Of
> course, since factor levels can only be assigned to consecutive integers,
> this does not work too well. Perhaps a feature worth removing? What do you
> think?
seemingly mixing features of factors and character vectors might bear the risk
of RKWard behaving ("feeling") considerably different than R does. on the
other hand i do see the feature.
maybe it would be better to keep labels strictly to factors only, but to also
have a switch to toggle between labeled view and integer view (like with
unclass())?
> > in fact, this doesn't work in RKWard either:
> > > some.data <- data.frame(a=c("a","b","c","d"), stringsAsFactors=FALSE)
>
> [...]
>
> > > some.data$a
> >
> > [1] "1" "2" "3" "4"
>
> I could not reproduce this, and we really don't mess with data.frame() on
> this level. Are you sure?
to my surprise i couldn't reproduce this myself at first. then i tried to
reconstruct the steps i did yesterday. it seems even weirder now. the effect
above occurs after rewriting a data.frame which is opened in the editor window
at the same time:
> other.data <- data.frame(a=c("a","b","c","d"))
(open object in editor)
> other.data
a
1 a
2 b
3 c
4 d
> other.data <- data.frame(a=c("a","b","c","d"), stringsAsFactors=FALSE)
> other.data
a
1 1
2 2
3 3
4 4
> other.data <- data.frame(a=c("a","b","c","d"))
> other.data
a
1 <NA>
2 <NA>
3 <NA>
4 <NA>
> other.data$a
[1] <NA> <NA> <NA> <NA>
attr(,".rk.invalid.fields")
attr(,".rk.invalid.fields")$`1`
[1] 1
attr(,".rk.invalid.fields")$`2`
[1] 2
attr(,".rk.invalid.fields")$`3`
[1] 3
attr(,".rk.invalid.fields")$`4`
[1] 4
Levels: a b c d
meanwhile, the same object is shown in the editor as a valid factor. all of
this does not occur if the object is not opened in the editor. maybe something
with the object binding or a race condition? or is this still caused by the
problem you solved already? i'll try again with the next daily build.
viele grüße :: m.eik
--
dipl. psych. meik michalke
abt. f"ur diagnostik und differentielle psychologie
institut f"ur experimentelle psychologie
heinrich-heine-universit"at d"usseldorf
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