On Sun, 2010-03-28 at 11:07 +0200, Jordi wrote: > I am quite new to maths and gsl I would like to get the angle between two > vectors.
In C it should be something like the following. (You may have to check where acos is defined, check norm_u * norm_v != 0; and you may want a direction with the angle.) For floats use snrm and sdot instead of dnrm and ddot. #include<gsl/gsl_blas.h> … gsl_vector* u, v; double norm_u, norm_v, x, angle; … norm_u = gdl_blas_dnrm( u ); norm_v = gdl_blas_dnrm( v ); gsl_blas_ddot( u, v, &x ); angle = acos( x / (norm_u * norm_v ) ); -- JDL _______________________________________________ Help-gsl mailing list Help-gsl@gnu.org http://lists.gnu.org/mailman/listinfo/help-gsl
