Today I ran into trouble with datenum('2021-07-21
09:00:00.987'). The fractional part. But what I soon
found is that this: datenum('2021-07-21
09:00:00.987','yyyy-mm-dd HH:MM:SS.FFF') works just
fine. (This is of course a primary use case of those who
would analyze SQL data.)
...
Looking at datevec.m, none of the std_formats have
FFF, so likely enhancing the search (though it works on
Matlab) makes no sense. Does it?
Generally there is resistance to trying to emulate
'undocumented matlab'. the matlab docs dont specify any
predefined formats including FFF. But, it does provide for
automatic recognition of the FFF string. So it appears that
Matlab's autorecognition does understand the format, despite
the datevec text saying: " If
you do not specify formatIn,
then DateString must
be in one of the following formats..." (none of which
include FFF)
I
don't think people would want to mess with the pre-defined
formats, since they're a compatibility item. There could
be an argument made expanding the autorecognition, though.