R help - Jul 2005 - calling R from C or C++

Hi,

I have C/C++ code from which I wish I could call R to
do something useful.

I saw a 2003 message by Thomas saying that "You can
compile R as a shared library, which allows you to
construct and evaluate R expressions from C."  Any
more information would be helpful.  I am looking for
some documentation that has a more step by step like
instructions.  Anyone who has experience, please point
me to some resources.

ps. There is a document on CRAN named "Writing R
extensions" which seems relevant, but it was too
difficult for me to understand.

Thanks in advance!

> Hi,
> 
> I have C/C++ code from which I wish I could call R
> to
> do something useful.
By calling I mean linking with the R shared library,
instead of R BATCH.

In particular, I want to use regression functions such
as ridge and locfit.  
> 
> I saw a 2003 message by Thomas saying that "You can
> compile R as a shared library, which allows you to
> construct and evaluate R expressions from C."  Any
> more information would be helpful.  I am looking for
> some documentation that has a more step by step like
> instructions.  Anyone who has experience, please
> point
> me to some resources.
> 
> ps. There is a document on CRAN named "Writing R
> extensions" which seems relevant, but it was too
> difficult for me to understand.
>

hi all

You should look into the "tests" directory (download the source
package extract it and you'll have the tests directory)

there are some exemples on how to embedded R into C.

I've got the same trouble, here nobody want to do that, and i don't know
why...
---------- Initial Header -----------
>From      : r-help-bounces at stat.math.ethz.ch
To          : Bahoo <b83503104 at yahoo.com>
Cc          : r-help at stat.math.ethz.ch
Date      : Sun, 24 Jul 2005 10:27:54 -0500
Subject : Re: [R] calling R from C or C++


On 23 July 2005 at 20:18, Bahoo wrote:
| > Hi,
| > 
| > I have C/C++ code from which I wish I could call R
| > to
| > do something useful.
| 
| By calling I mean linking with the R shared library,
| instead of R BATCH.
| 
| In particular, I want to use regression functions such
| as ridge and locfit.  
| 
| > 
| > I saw a 2003 message by Thomas saying that "You can
| > compile R as a shared library, which allows you to
| > construct and evaluate R expressions from C."  Any
| > more information would be helpful.  I am looking for
| > some documentation that has a more step by step like
| > instructions.  Anyone who has experience, please
| > point
| > me to some resources.
| > 
| > ps. There is a document on CRAN named "Writing R
| > extensions" which seems relevant, but it was too
| > difficult for me to understand.

Just get the Magic Wand from the Harry Potter books; that way you get the
functionality for free without having to read those pesky and difficult
documents we provide to explain how to do the other way -- when your Magic
Wand is broken.

Dirk, who still wants chocolate to grow on trees, preferably in his backyard

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-- 
Statistics: The (futile) attempt to offer certainty about uncertainty.
         -- Roger Koenker, 'Dictionary of Received Ideas of Statistics'

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