Hi, I don't know exactly, but try replacing the one line %apply (float* INPLACE_ARRAY1, int DIM1) {(float *a, int na), (float *b, int nb)}; with two lines: %apply (float* INPLACE_ARRAY1, int DIM1) {(float *a, int na)}; %apply (float* INPLACE_ARRAY1, int DIM1) {(float *b, int nb)}; Don't know about the '{' '}' brakets. b could probably be "more general" as INPUT_ARRAY1 HTH -S. On Thu, May 20, 2010 at 1:43 AM, Steven Nien wrote:

I want to pass 1 integer and 2 numpy array into the C function as followings:

void update_incident_field(int k, float *a, int na, float *b, int nb) { for (i=0; i

But I don't know how to write the interface code (***.i) Can someone help me?

Thanks!

The swig interface code I written(did't work, strange output)

%module example %{ #define SWIG_FILE_WITH_INIT #include "example.h" %} %include "numpy.i"

%init %{     import_array(); %}

%apply (float* INPLACE_ARRAY1, int DIM1) {(float *a, int na), (float *b, int nb)};

%include "example.h"

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Hi Thanks for all your help! I found the "strange" result was caused by my algorithm(CUDA). The swig part is very ok:) On Thu, May 20, 2010 at 11:18 PM, Bill Spotz wrote:

I tried the following:

%module example %{ #define SWIG_FILE_WITH_INIT //#include "example.h" %} %include "numpy.i"

%init %{ import_array(); %}

%apply (float* INPLACE_ARRAY1, int DIM1) {(float *a, int na), (float *b, int nb)};

%inline { void update_incident_field(int k, float *a, int na, float *b, int nb) { for (i=0; i

$ swig -python example.i

and the resulting example_wrap.c file looks OK for me. What strange output did you get?

On May 19, 2010, at 7:43 PM, Steven Nien wrote:

...

I want to pass 1 integer and 2 numpy array into the C function as followings:

void update_incident_field(int k, float *a, int na, float *b, int nb) { for (i=0; i

But I don't know how to write the interface code (***.i) Can someone help me?

Thanks!

The swig interface code I written(did't work, strange output)

%module example %{ #define SWIG_FILE_WITH_INIT #include "example.h" %} %include "numpy.i"

%init %{ import_array(); %}

%apply (float* INPLACE_ARRAY1, int DIM1) {(float *a, int na), (float *b, int nb)};

%include "example.h"

** Bill Spotz ** ** Sandia National Laboratories Voice: (505)845-0170 ** ** P.O. Box 5800 Fax: (505)284-0154 ** ** Albuquerque, NM 87185-0370 Email: wfspotz@sandia.gov **

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