Re: [Help-gsl] permute vector

[Frank Reininghaus]

Hi,

you have to add the following line to your code:

#include <gsl/gsl_permute_vector.h>

because the function gsl_permute_vector () is declared there. I couldn't find 
this in the manual though - this should probably be fixed.

The return value 'int' is used in many GSL functions to tell the user if the 
function call was successful (the constant GSL_SUCCESS is returned in this 
case) or if the input data contained any error. The funcion 
gsl_permute_vector () checks if the vector dimension matches the size of the 
permutation (3 in your example). If this is not the case, the function calls 
the error handler (either the default handler which prints an error message 
and aborts the program or a user-defined one) and returns the error code 
GSL_EBADLEN.

If you are sure that the input data are OK (or if you are happy with the 
default error handler that aborts the program if they're not), you don't have 
to check the return value.

The GSL manual contains quite a lot of examples. The source files are in the 
directory doc/examples/ in the GSL source distribution.

I hope I could help you!

Cheers,
Frank