[Octave-bug-tracker] [bug #48690] basic statistics functions should return NaN on empty input

[Nicholas Jankowski]

Follow-up Comment #21, bug #48690 (project octave):

also, two requests if anyone wants to take a look at cov:

1 - I would appreciate if anyone had a good example of how using inputParser
would have made varargin handling easier. Having little familiarity with it, I
thought this would be a good example to learn on. But it seemed that by the
time I was done writing all the validation functions, it wasn't going to be
any less messy than the manual parsing I came up with, so I left it that way.

2 - the case of 'partialrows' for a single input is a bit odd. I wound up
using a recursive call to cov with the 'omitrows' parameter in a double for
loop. This does the job, but I'm sure it's ridiculously slow between the
looping and the overhead from calling cov. If it's not to onerous, I'd
appreciate suggestions on how to flatten it. 

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