Hi Jason,
If I understand correctly, you are looking for something along the lines of
with(X, tapply(author, articleID, function(x) length(unique(x
# 1 2 3
# 1 2 2
with X your data frame.
HTH,
Jorge
On Sun, Nov 1, 2009 at 1:20 AM, Jason Priem <> wrote:
> I've got a data frame describing
On Nov 1, 2009, at 1:59 AM, Patrick Connolly wrote:
On Sun, 01-Nov-2009 at 01:20AM -0500, Jason Priem wrote:
I've got a data frame describing comments on an electronic journal,
wherein each row is a unique comment, like so:
commentID author articleID
1 1 smith 2
2
On Sun, 01-Nov-2009 at 01:20AM -0500, Jason Priem wrote:
> I've got a data frame describing comments on an electronic journal,
> wherein each row is a unique comment, like so:
>
> commentID author articleID
> 1 1 smith 2
> 2 2 jones 3
> 3 3 andrews
Hi Jason,
As your example is not reproducible, may be something like:
myFreq<-data.frame(table(articleID, author))
if you want to know only those articles with 1 author, you can try
subset(myFreq, Freq==1)
or something like.
bests
milton
On Sun, Nov 1, 2009 at 2:20 AM, Jason Priem wrote:
I've got a data frame describing comments on an electronic journal,
wherein each row is a unique comment, like so:
commentID author articleID
1 1 smith 2
2 2 jones 3
3 3 andrews 2
4 4 jones 1
5 5 johnson 3
6
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