On 4/4/13 1:52 AM, Chris Barker - NOAA Federal wrote: > Thanks all for taking an interest. I need to think a bot more about > the options before commenting more, but: > > while we're at it: > > It seems very odd to me that datetime64 supports different units > (right down to attosecond) but not different epochs. How can it > possible be useful to use nanoseconds, etc, but only right around > 1970? For that matter, why all the units at all? I can see the need > for nanosecond resolution, but not without changing the epoch -- so if > the epoch is fixed, why bother with different units? <snip>
When Ivan and me were discussing that, I remember us deciding that such a small units would be useful mainly for the timedelta datatype, which is a relative, not absolute time. We did not want to make short for very precise time measurements, and this is why we decided to go with attoseconds. -- Francesc Alted _______________________________________________ NumPy-Discussion mailing list [email protected] http://mail.scipy.org/mailman/listinfo/numpy-discussion
