Not very easy task...
Here is interpolation example in C.
http://www.gnu.org/software/gsl/manual/html_node/Interpolation-Example-programs.html
As you can see, you need to call several functions to get what you want.
Declaring those in Gambas is OK, *except* determining interpolation type!
You can find definition of interpolation type from "gsl_interp.h",
and unfortunately it is not anything simple;
typedef struct {
const char * name;
unsigned int min_size;
void * (*alloc) (size_t size);
int (*init) (void *, const double xa[], const double ya[], size_t
size);
int (*eval) (const void *, const double xa[], const double ya[],
size_t size, double x, gsl_interp_accel *, double * y);
int (*eval_deriv) (const void *, const double xa[], const double
ya[], size_t size, double x, gsl_interp_accel *, double * y_p);
int (*eval_deriv2) (const void *, const double xa[], const double
ya[], size_t size, double x, gsl_interp_accel *, double * y_pp);
int (*eval_integ) (const void *, const double xa[], const double
ya[], size_t size, gsl_interp_accel *, double a, double b, double * result);
void (*free) (void *);
} gsl_interp_type;
GSL_VAR const gsl_interp_type * gsl_interp_cspline; * <-- this is used in
example*
Right now I don't know how to implement that reasonably in Gambas.
There are at least three possibilities to overcome this problem:
1. Hope that Benoit will implement new feature to use external structures.
2. Use C to write your own interface between GSL and Gambas. Perhaps easiest
option.
3. Do not use GSL at all, and write what you need purely with Gambas.
That's all I can say...
Also because you didn't specify what you need exactly, nor are you using
Gambas 2 or 3.
Jussi
On Mon, May 16, 2011 at 09:32, wally <wa...@voosen.eu> wrote:
> Hello,
>
> i need to process an integerarray using GSL (Gnu Scientific Library)
> but i do not know how to do it. Does anybody have a code example
> how to provide the array data to gsl and get back interpolation, derivative
> and integral data ?
>
> wally
>
>
> ------------------------------------------------------------------------------
> Achieve unprecedented app performance and reliability
> What every C/C++ and Fortran developer should know.
> Learn how Intel has extended the reach of its next-generation tools
> to help boost performance applications - inlcuding clusters.
> http://p.sf.net/sfu/intel-dev2devmay
> _______________________________________________
> Gambas-user mailing list
> Gambas-user@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/gambas-user
>
------------------------------------------------------------------------------
Achieve unprecedented app performance and reliability
What every C/C++ and Fortran developer should know.
Learn how Intel has extended the reach of its next-generation tools
to help boost performance applications - inlcuding clusters.
http://p.sf.net/sfu/intel-dev2devmay
_______________________________________________
Gambas-user mailing list
Gambas-user@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/gambas-user
