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, <[EMAIL PROTECTED]> 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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>
--
http://had.co.nz/
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