continue;
double *x = gsl_matrix_ptr (kmeans->updated_centers, group, j);
*x += val->f * (qc->wv ? case_data (c, qc->wv)->f : 1.0);
continue;
double *x = gsl_matrix_ptr (kmeans->updated_centers, group, j);
*x += val->f * (qc->wv ? case_data (c, qc->wv)->f : 1.0);