Since gsl_matrix_add is a basic function for adding matrices, it should perfom and operation gsl_matrix_add(a, b, c) --> c = a + b not just gsl_matrix_add(a, b) --> a = a + b. Now to add two matrices and store the result in the third, I have to call two functions instead of just one. -- Ten e-mail został sprawdzony i zaakceptowany przez fretkę Tintin.