Apologies, just a typo in the first instruction (when translating the
names), the question is still valid
On 21 Oct 2008, at 00:38, Ivan Alves wrote:
Dear all,
I would like to aggregate a data frame (consisting of 2 columns - one
for the bins, say factors, and one for the values) along bins and
quantiles within the bins.
I have tried
aggregate(data.frame$values, list(bin = data.frame
$bin,Quantile=cut2(data.frame$values,g=10)),sum)
but then the quantiles apply to the population as a whole and not the
individual bins. Upon this realisation I have tried
aggregate(data.frame$values, list(bin = data.frame
$bin,Quantile=tapply(data.frame$values,data.frame$bin,cut2,g=10)),sum)
which gives the following error:
Error in sort.list(unique.default(x), na.last = TRUE) :
'x' must be atomic for 'sort.list'
Have you called 'sort' on a list?
clearly I am doing something wrong, but cannot figure out what. I
believe the error stems either from a. the output of tapply being a
list of a dimension equal to the number of bins, and not a list of
equal dimension as the values, or b. that somehow aggregate does not
like that the second list (of the quantiles within the bins which do
not appear to be
sorted nicely)
1. Do you have a reference for doing the summation on both bins and
quantiles within the bins?
2. If not, can you give me some guidance as to what I am doing wrong
and how I can solve the sort/list issue?
Any help would be greatly appreciated
Kind regards,
Ivan Alves
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