Hello Jussi, in C the stuff works pretty nice, so i agree to your suggestion 2.
Do all math stuff directly in Gambas is an option i should check. I think i mentioned that i use Gambas3 and want to make interpolations, derivatives and integrals from an integrarray. The array contains ADC outputs from a CCD linear array sensor measurment wally On Monday, May 16, 2011 17:46:51 Jussi Lahtinen wrote: > Not very easy task... > Here is interpolation example in C. > http://www.gnu.org/software/gsl/manual/html_node/Interpolation-Example-prog > rams.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 End of encapsulated message ------------------------------------------------------------------------------ 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
