Am 10.01.2012 um 18:03 schrieb John D Lamb: > Is there any particular reason why gsl should abort on > gsl_vector_alloc( 0 ) and gsl_matrix_alloc( 0 )? > > It is straightforward to construct a gsl_vector or matrix of size 0. And > I think all the vector and matrix operations behave appropriately on > such as vector or matrix: that is, they do not abort if the operation is > meaningful, even if the result is undefined. > > There are occasions when it is useful to allow a vector of size 0. For > example, it is easier to put a gsl_vector* in a struct and interrogate > it with gsl_vector_size( s.vector ) than with s.vector == 0 ? 0 : > gsl_vector_size( s.vector ). > > -- > John D Lamb > >
I agree. In LAPACK vectors of length zero or matrices with zero rows or columns are used/allowed because it often eases the implementation of numerical algorithms. Michael _______________________________________________ Help-gsl mailing list Help-gsl@gnu.org https://lists.gnu.org/mailman/listinfo/help-gsl
