Why yes. If you keep reading the helpfile for merge, you come to this bit:
Value:
A data frame. The rows are by default lexicographically sorted on
the common columns, but for ‘sort = FALSE’ are in an unspecified
order.
sort=FALSE doesn't preserve your order; instead it gives you an
unspecified potentially random order.
Sarah
On Wed, Jan 27, 2010 at 5:13 PM, lol zino <lolz...@gmail.com> wrote:
> Hello,
>
[...]
>
> I am attempting to merge them using the following:
>
> mergeddata <- merge(data1,data2, by.x="index", by.y="index2", sort=FALSE)
>
> I want to preserve the order of data1 by setting sort=FALSE, however
> the output I get is:
>
[...]
>
> which has not preserved the order of data1, and also does not have a
> clear relationship to the order of data2 that I can see. I also tried
> converting both index fields from chars to ints and got the same
> result. Any ideas of what is going on here?
>
> ______
--
Sarah Goslee
http://www.functionaldiversity.org
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