[R] .C and character

[Torsten Hothorn]

On 25 Mar 1999, Douglas Bates wrote:

> >>>>> "Torsten" == Torsten Hothorn <hothorn at amadeus.statistik.uni-dortmund.de> writes:
> 
>   Torsten> Hi, I had a problem passing characters from R into c-code
>   Torsten> by dyn.load() and .C().
> 
>   Torsten> test1.c: void R2Cstr(char *str) { printf("\n my char: %s
>   Torsten> \n", str[0]); }
> 
> You must declare str as char **str.  The basic character vector in R
> is a vector of strings, not a vector of characters.  Notice that the
> way you are printing it assumes that str[0] is char *, not char.
> If you change your example to
> 
> test1.c:
> 	void R2Cstr(char **str)
> 	{
> 		printf("\n my char: %s \n", str[0]);
> 	}
> 
> test1.R:
> 	dyn.load("mylib.so");
> 	.C("R2Cdouble", as.character("test"));
> 
> it should work.

Yes, it does. Thanx very much,

Torsten

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