Hi John,
I don't think your x2 is right, but who knows?
One possible approach would be:
R> lapply(split(x2$recipients, unique(x2$sender)), paste, collapse=", ")
$`a...@email.com`
[1] "b...@email.com, f...@email.com"
$`r...@email.com`
[1] "c(\"c...@email.com\", \"d...@email.com\"), h...@email.com"
but again, who knows exactly what the OP wants?
You sent this just to me; I've copied the R-help list back again.
Sarah
On Fri, Jul 11, 2014 at 3:19 PM, John McKown
<john.archie.mck...@gmail.com> wrote:
> On Fri, Jul 11, 2014 at 11:27 AM, Sarah Goslee <sarah.gos...@gmail.com> wrote:
>> Hi Ryan,
>>
>> We can't tell from your example what structure your original data are
>> in, nor what your output is intended to look like, or for that matter
>> how you got from one to the other. Please don't post in HTML because
>> it gets mangled!
>>
>> Using dput() to provide your example data is the best thing, because
>> that preserves R structures. And an R-format example of your desired
>> output would also be helpful.
>>
>> Sarah
>
> In a, perhaps vain, attempt to be helpful, I think the following
> output from what I constructed myself will show what the OP was
> talking about:
>
>> dput(x2)
> structure(list(sender = c("a...@email.com", "a...@email.com",
> "r...@email.com",
> "r...@email.com"), recipients = list("b...@email.com", c("c...@email.com",
> "d...@email.com"), "f...@email.com", "h...@email.com")), .Names = c("sender",
> "recipients"), row.names = c(NA, -4L), class = "data.frame")
>
> I probably should have called it "mailingList" instead of x2, no?
>
> Now, after "wasting" too much time, perhaps somebody will come up with
> a solution. I could "brute force" something (yes, you can write
> FORTRAN style code in R!). But have been "sensitized" from doing so by
> others.
>
> --
> There is nothing more pleasant than traveling and meeting new people!
> Genghis Khan
>
> Maranatha! <><
> John McKown
--
Sarah Goslee
http://www.sarahgoslee.com
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