Re: [R] Pass String from R to C

2011-04-25 Thread Jaimin Dave 
I tried using char ** but it is printing some random string.

On Sat, Apr 23, 2011 at 6:08 PM, Duncan Murdoch murdoch.dun...@gmail.comwrote:

 On 11-04-23 7:04 PM, Jaimin Dave wrote:

 Hi,
 I am using a function which accepts the string from R and prints it.
 But when I am calling .C(main,hello);
 it is printing any random thing.
 My C function is
 void main(char *str)


 See Writing R Extensions.  The declaration should be char **str.

 Duncan Murdoch

  {
 Rprintf(%s,str);
 }

 Can you help how to achieve this using .C interface?

 Thanks
 Jaimin

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Re: [R] Pass String from R to C

2011-04-25 Thread Duncan Murdoch 

On 25/04/2011 12:51 PM, Jaimin Dave wrote:

I tried using char ** but it is printing some random string.


str is a pointer to an array of pointers to strings.  That's what char** 
means.  So you need to declare it that way, and use it that way.


This works for me:

File test.c:

void test(char **str)
{
  Rprintf(%s,*str);
}

Duncan Murdoch

On Sat, Apr 23, 2011 at 6:08 PM, Duncan Murdochmurdoch.dun...@gmail.comwrote:

  On 11-04-23 7:04 PM, Jaimin Dave wrote:

  Hi,
  I am using a function which accepts the string from R and prints it.
  But when I am calling .C(main,hello);
  it is printing any random thing.
  My C function is
  void main(char *str)


  See Writing R Extensions.  The declaration should be char **str.

  Duncan Murdoch

   {
  Rprintf(%s,str);
  }

  Can you help how to achieve this using .C interface?

  Thanks
  Jaimin

 [[alternative HTML version deleted]]

  __
  R-help@r-project.org mailing list
  https://stat.ethz.ch/mailman/listinfo/r-help
  PLEASE do read the posting guide
  
http://www.R-project.org/posting-guide.htmlhttp://www.r-project.org/posting-guide.html
  and provide commented, minimal, self-contained, reproducible code.




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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.


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R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

Re: [R] Pass String from R to C

2011-04-25 Thread Duncan Murdoch 

On 25/04/2011 1:03 PM, Duncan Murdoch wrote:

On 25/04/2011 12:51 PM, Jaimin Dave wrote:
  I tried using char ** but it is printing some random string.

str is a pointer to an array of pointers to strings.  That's what char**
means.  So you need to declare it that way, and use it that way.

This works for me:

File test.c:

void test(char **str)
{
Rprintf(%s,*str);
}


Oops, I just noticed that the include was missing.  The full file should 
have


#include R.h

at the beginning.

Duncan Murdoch



Duncan Murdoch
  On Sat, Apr 23, 2011 at 6:08 PM, Duncan 
Murdochmurdoch.dun...@gmail.comwrote:

 On 11-04-23 7:04 PM, Jaimin Dave wrote:
  
 Hi,
 I am using a function which accepts the string from R and prints it.
 But when I am calling .C(main,hello);
 it is printing any random thing.
 My C function is
 void main(char *str)
  
  
 See Writing R Extensions.  The declaration should be char **str.
  
 Duncan Murdoch
  
  {
 Rprintf(%s,str);
 }
  
 Can you help how to achieve this using .C interface?
  
 Thanks
 Jaimin
  
[[alternative HTML version deleted]]
  
 __
 R-help@r-project.org mailing list
 https://stat.ethz.ch/mailman/listinfo/r-help
 PLEASE do read the posting guide
 
http://www.R-project.org/posting-guide.htmlhttp://www.r-project.org/posting-guide.html
 and provide commented, minimal, self-contained, reproducible code.
  
  
  

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  __
  R-help@r-project.org mailing list
  https://stat.ethz.ch/mailman/listinfo/r-help
  PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
  and provide commented, minimal, self-contained, reproducible code.



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R-help@r-project.org mailing list
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and provide commented, minimal, self-contained, reproducible code.

[R] Pass String from R to C

2011-04-23 Thread Jaimin Dave 
Hi,
I am using a function which accepts the string from R and prints it.
But when I am calling .C(main,hello);
it is printing any random thing.
My C function is
void main(char *str)
{
Rprintf(%s,str);
}

Can you help how to achieve this using .C interface?

Thanks
Jaimin

[[alternative HTML version deleted]]

__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.

Re: [R] Pass String from R to C

2011-04-23 Thread Duncan Murdoch 

On 11-04-23 7:04 PM, Jaimin Dave wrote:

Hi,
I am using a function which accepts the string from R and prints it.
But when I am calling .C(main,hello);
it is printing any random thing.
My C function is
void main(char *str)


See Writing R Extensions.  The declaration should be char **str.

Duncan Murdoch


{
Rprintf(%s,str);
}

Can you help how to achieve this using .C interface?

Thanks
Jaimin

[[alternative HTML version deleted]]

__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.


__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.