[R] Sorting method used by order()

[Duncan Murdoch]

On 02/12/2014, 7:28 AM, Pierrick Bruneau wrote:
> I'll try to be more specific:
> - ?order points to a common man page for both order() and sort.list()
> - sort.list() has a "method" argument, i.e. a sorting algorithm. As far as
> I can read, I'll rather say the default is "shell"
> - order() seems not to support this argument. My questions were thus 1)
> what is the algorithm it uses ("shell" or other), and 2) is there a way to
> parametrize it.

For sort.list(), "shell" is the default for most objects, but "radix" is
sometimes used:  see the Details section in the help page.

For order(), the method is undocumented and not under your control.  Use
sort.list() if you need the control.  Read the source if you want to
know the current implementation (but being undocumented, it might change
without notice in a future release).

Duncan Murdoch

> 
> On Tue, Dec 2, 2014 at 1:17 PM, PIKAL Petr <petr.pikal at precheza.cz> wrote:
> 
>> Hi
>>
>> Can you be more specific? How do you want parametrize order?
>>
>> There is no sort.list argument in order.
>>
>> For sort list, the default method is "radix", AFAIK.
>>
>> Cheers
>> Petr
>>
>>> -----Original Message-----
>>> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of
>>> Pierrick Bruneau
>>> Sent: Tuesday, December 02, 2014 12:33 PM
>>> To: r-help at stat.math.ethz.ch
>>> Subject: [R] Sorting method used by order()
>>>
>>> Hi all,
>>>
>>> In ?order, the sorting method used appears as the "method" argument to
>>> sort.list(), but I cannot make out which is used by default when
>>> calling order(), and how to parametrize it.
>>>
>>> Does someone have a clue there?
>>>
>>> Thanks by advance,
>>> Pierrick
>>>
>>>       [[alternative HTML version deleted]]
>>>
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> 	[[alternative HTML version deleted]]
> 
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