Re: [Gretl-devel] scalar function args and NAs
Am 05.07.2015 um 17:08 schrieb Allin Cottrell:
But maybe this is something we want to think about. Are there real
use-cases where a function writer would want to accept NA for a bool or
int argument? Or would it be more convenient for the writer not to have
to bother with checking for NAs, in the knowledge that they would be
ruled out by gretl?
Well, NaN rather than NA, but since they're not differentiated in gretl:
In principle I could imagine that a function has the log-value of
something as its input. Then the caller could write:
thefunc(log(thisvalue))
which could end up as thefunc(NA) for thisvalue <= 0. The question then
is really who should bear the burden of sanity checking, the function or
the caller.
Both is possible IMO.
sven