I added some comments comparing SRFI 231 routines to some of NumPy's
array routines to a branch of my fork of SRFI 231:

https://github.com/gambiteer/srfi-231/commit/51ec61619bf0ae063e5daca89120dc17e18f097b

Some feedback would be helpful:

1.  Is it helpful?
2.  Should I continue with more comparisons, to more of NumPy, to APL, ...?
3.  Should this be added to the main SRFI 231 repository as informal
commentary?

I'd welcome contributions from anyone else (especially those with better
understandings of NumPy than I have, which is minimal).

Brad