On 19Apr2022 08:02, DL Neil <PythonList at DancesWithMice.info> wrote: >BTW this looks more like numpy than Python... numpy is a popular Python library. I've no objection to dealing with it in the "tutor" list for questions we can help with. (I'm not a numpy expert, though I'm starting to dabble in it.) Cheers, Cameron Simpson <cs at cskk.id.au>