Am 24.07.2018 um 16:18 schrieb Allin Cottrell:

Following discussions between Jack and myself, here's a sort of
"RFC" for changing the internal definition of "NA" in gretl, which we believe can be done with full backward compatibility.

Little PDF attached.

Thanks for the excellent exposition of the problem. One thing I don't understand from the document, however, is what would happen in the end with the NA * 0 = 0 feature when NA becomes nan. AFAICS your point is that it would be a nice feature but we don't have it currently, anyway, so let's forget about it forever? (Not saying I'd be against this, just trying to understand for now.)
thanks,
sven