On 28/05/2009 6:06 PM, 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...
Each of the things I described to you would take about a line of code,
plus the logic of the comparisons. So the hoops R makes you jump
through amount to 2-4 extra lines of code. C++ is probably going to
take at least that much.
Duncan Murdoch
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