On Tue, 7 Jun 2011, Sven Schreiber wrote:
Am 07.06.2011 09:48, schrieb Riccardo (Jack) Lucchetti:
> On Fri, 3 Jun 2011, Ignacio Diaz-Emparanza wrote:
>
>> ¿Is it normal that the simple command
>>
>> series x
>>
>> generates zeros ? I thought it should generate NAs
>
> Hm, you may be right. However: is there any particular reason why one
> choice should be strongly preferred to the other?
>
Yes, because zeroes look like valid data, which in this case they are
not. Imagine that further down you do something with x in a restricted
sample, and then revert to the full sample again.
Point taken.
There is a strange kind of zero affinity among the gretl coders it
seems
:-) (think of 0*NA==0)
Don't get me started on this...! ;-)
Riccardo (Jack) Lucchetti
Dipartimento di Economia
Università Politecnica delle Marche
r.lucchetti(a)univpm.it
http://www.econ.univpm.it/lucchetti