//export fit_go_f
func fit_go_f(x C.const_gsl_vector, fn unsafe.Pointer, f *C.gsl_vector) C.int {
gofn := *((*FitData)(fn))
gx := vecFromGSL(x)
for i := 0; i < gofn.N; i++ {
val, err := gofn.F(gx, i)
if err != nil {
// Assume that if F returns an error, x is outside
// the domain.
return C.GSL_EDOM
}
C.gsl_vector_set(f, C.size_t(i), C.double(val))
}
return C.GSL_SUCCESS
}
// Convert v to GSL format.
func VecToGSL(v vec.Vector, target *C.gsl_vector) {
dim := len(v)
for i := 0; i < dim; i++ {
C.gsl_vector_set(target, C.size_t(i), C.double(v[i]))
}
}