[R-pkg-devel] R_orderVector1 - algo: radix, shell, or another?
You asked how order works. From the R source you can follow which C functions are executed, and since you seem familiar with C you can answer your own question.
On September 24, 2023 11:10:53 AM PDT, Jan Gorecki <j.gorecki at wit.edu.pl> wrote:
Hi Jeff, Yes I did. My question is about R_orderVector1 which is part of public R C api. Should I notice something relevant in the source of R's order? Best Jan On Sun, Sep 24, 2023, 17:27 Jeff Newmiller <jdnewmil at dcn.davis.ca.us> wrote:
Have you read the output of order entered at the R console? On September 24, 2023 1:38:41 AM PDT, Jan Gorecki <j.gorecki at wit.edu.pl> wrote:
Dear pkg developers, Are there any ways to check which sorting algorithm is being used when calling `order` function? Documentation at https://stat.ethz.ch/R-manual/R-devel/library/base/html/sort.html says it is radix for length < 2^31 On the other hand, I am using R_orderVector1, passing in double float smaller than 2^31. Short description of it states "Fast version of 1-argument case of R_orderVector". Should I expect R_orderVector1 follow the same algo as R's order()? If so it should be radix as well.
If there is no way to check sorting algo, could anyone describe which one R_orderVector1 uses, and if there is easy API to use different ones from
C?
Best Regards,
Jan Gorecki
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