request of information about creating DLL from R to be used in other languages/programs

----- Original Message -----
From: "Duncan Murdoch" <murdoch.duncan at gmail.com>
To: "Ludovic.Brossard" <ludovic.brossard at rennes.inra.fr>
Cc: r-devel at r-project.org
Sent: Friday, July 18, 2014 9:17:12 PM
Subject: Re: [Rd] request of information about creating DLL from R to be used in other languages/programs

On 18/07/2014, 1:26 PM, Ludovic.Brossard wrote:
Thanks for this answer.
If I have well understood, there is no way to create dll and call it
without having R installed on the computer ?
R is open source so you could probably work out something, but there is
no built-in support for doing that.
As a (potential) alternative solution to the problem, you may want to address R functionality over RESTful web services, using e.g. the R Service Bus.
Then your Delphi clients can all make use of a single central installation of R.

See

http://rsb.doc.openanalytics.eu/dev/

for the technical documentation and

http://rsb.doc.openanalytics.eu/dev/wsdocs/index.html

for the API overview.

Best,
Tobias
Duncan Murdoch

Sorry if I am wrong i am not a specialist.
thanks

Ludovic Brossard

On 18/07/2014, 10:29 AM, Ludovic Brossard wrote:

Hello

My question is the following. I have tried to find a similar subject in
archives but not found (perhaps bad search!) and I tried R-help and I was
advised that R-devel would perhaps better for my question

So I wonder if it is possible to create a dll from a R code to use it in
another language/program.

Indeed, one of my colleague wrote a R code combining some R functions to
create a method of calculation.

I would want to use this method in a program coded in Delphi.

Is there possibilities to create a DLL from R code to be called in the
Delphi program ?

It would allow us to avoid rewriting code and searching correspondence
between R functions and Delphi program (or other types of tools as
TPMath).

Is it possible to call a dll form R whereas R is not installed on the
computer?

I hope to be clear in my demand an I hope you will be able to give me
some
indications or where to find it.

Most of this is possible, but not easy.  See chapter 8 of the "Writing R
Extensions" manual.  You are essentially writing a new "front-end" to R,
and it will require R to be installed for it to work.

Many years ago I wrote instructions for using Delphi to create a DLL for
R to use, which is another approach you could try.  I've no idea how
obsolete those instructions are nowadays, but they might give you some
starting points:

http://www.stats.uwo.ca/faculty/murdoch/software/compilingDLLs/pascal.html

Duncan Murdoch
Best regards

Ludovic Brossard

Ludovic BROSSARD

UMR PEGASE (Physiologie, Environnement et G?n?tique pour l?Animal et les
Syst?mes d?Elevage)

INRA ? Agrocampus Ouest

Domaine de la Prise, 35590 Saint-Gilles, France

T?l : 33 (0)2 23 48 70 57 . Fax : 33(0)2 23 48 50 80

<http://www.rennes.inra.fr/pegase> www.rennes.inra.fr/pegase
<http://www.rennes.inra.fr/pegase>.

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Ludovic Brossard
INRA - UMR PEGASE
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tel : 02 23 48 70 57
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request of information about creating DLL from R to be used in other languages/programs

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