[R] Reshape with var as fun.aggregate

[locklin.jason at gmail.com]

Thanks, that works fine.
_______
Regards,
Jason Locklin, B.Sc. Hons.
University of Waterloo
http://artsweb.uwaterloo.ca/~jalockli


On Wednesday 26 November 2008 19:49:48 you wrote:
> Hi Jason,
>
> The reason you are getting this error is that the latest version of
> reshape uses fun.aggregate(numeric(0)) to figure out what missing
> values should be filled in with.  Unfortunately there was a brief
> period in R versions when var(numeric(0)) returned an error rather
> than a missing value.  You can work around the problem by manually
> specifying fill = NA.
>
> Regards,
>
> Hadley
>
> On Wed, Nov 26, 2008 at 1:05 PM,  <locklin.jason at gmail.com> wrote:
> > I used to be able to use variance for fun.aggregate, but since I
> > upgraded from R 2.6 to 2.7 (Ubuntu hardy to intrepid), it no
> > longer works.
> >
> >> library("reshape")
> >> data("french_fries")
> >> ffm <- melt(french_fries, id=1:4, na.rm = TRUE)
> >> cast(ffm, rep ~ treatment, length)
> >
> >  rep   1   2   3
> > 1   1 579 578 575
> > 2   2 580 579 580
> >
> >> cast(ffm, rep ~ treatment, mean)
> >
> >  rep        1        2        3
> > 1   1 3.207772 3.177336 3.024522
> > 2   2 3.181207 3.115544 3.277759
> >
> >> cast(ffm, rep ~ treatment, var)
> >
> > Error in fun.aggregate(data$value[0]) : 'x' is empty
> >
> > Any ideas?
> >
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