>>>>> "VM" == Volodymyr Melnykov <volm...@iastate.edu>
>>>>> on Tue, 21 Apr 2009 21:42:44 -0500 writes:
VM> On Tue, 21 Apr 2009 21:49:36 -0400
VM> Duncan Murdoch <murd...@stats.uwo.ca> wrote:
>> On 21/04/2009 9:39 PM, Volodymyr Melnykov wrote:
>> > Dear all,
>> >
>> > We have created an R package and submitted it to C-RAN. The package
>> > includes several C functions that use Rmath library. The package
>> > cannot be installed on a computer where -lRmath is not found. We
>> > were suggested to do a configure test for this but I am not really
>> > sure how to do this and where to read about this. What is a usual
>> > way to deal with R packages with c-functions using Rmath?
>>
>> I thought that the functions in libRmath are extracted from R, which
>> packages normally link to without any special effort. You only need
>> Rmath if you are writing a standalone C program, not if you are
>> writing an R package.
>>
>> Duncan Murdoch
>>
VM> Thank you for your response.
VM> I need c-functions because they are much faster than their R versions.
VM> In my c-functions, I use rnorm(), rgamma() and other functions like
VM> these.
Sure! and Duncan is 100% correct that there's no need at all to
use Rmathlib which *is* for standalone applications and not for
R packages.
VM> I am not sure how I would do this without Rmath.
(Re)read "Writing R Extensions".
The math functions are (almost) all part of the exported API!
The relevant chapter in the extensions manual is currently called
'The R API: entry points for C code'
Regards,
Martin Maechler, ETH Zurich
VM> Thanks,
VM> Volodymyr
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