select_by_degrees()

M2_arrayintOrNull FreeModule::select_by_degrees	(	M2_arrayintOrNull	lo,
		M2_arrayintOrNull	hi ) const

Definition at line 415 of file freemod.cpp.

{
  auto D = R->degree_monoid();
  std::vector<size_t> result;
  int ndegrees = D->n_vars();
  exponents_t exp = newarray_atomic(int, ndegrees);
  for (int i = 0; i < rank(); i++)
    {
      D->to_expvector(degree(i), exp);
#if 0
      for (int i=0; i<ndegrees; i++)
        printf("%d ", exp[i]);
      if (degree_in_box(ndegrees, exp, lo, hi))
        printf("yes\n");
      else
        printf("no\n");
#endif
      if (degree_in_box(ndegrees, exp, lo, hi)) result.push_back(i);
    }
  M2_arrayint selection = stdvector_to_M2_arrayint(result);
  freemem(exp);
  return selection;
}

References degree(), degree_in_box(), freemem(), newarray_atomic, R, rank(), result(), and stdvector_to_M2_arrayint().

Referenced by rawFreeModuleSelectByDegrees().