[R] custom sort?

Wacek Kusnierczyk Waclaw.Marcin.Kusnierczyk at idi.ntnu.no
Fri May 29 08:38:22 CEST 2009

Steve Jaffe wrote:
> hmm, that is what I was afraid of. I considered that but thought to myself,
> surely there must be an easier way.  I wonder why this feature isn't
> available. It's there in scripting languages, like perl, but also in
> "hardcore" languages like C++ where std::sort and sorted containers allow
> the user to provide a comparison function (even for builtin types like int).
> It's hard to believe that you have to jump through more hoops to do a custom
> sort in R than in C++ ...
> You put a class on the vector...

there has been some discussion on sorting here some time ago;  r folks
do not seem to accept the idea of sorting as a generic task, with the
sorting algorithm a separate thing from the comparison operator and the
type of the elements to be sorted.  (hence you can't sort arbitrary
lists, for example.) 

you may want to lookup the archives.


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