[Gretl-users] vertical matrix concatenation (was matrix declaration error)

Riccardo (Jack) Lucchetti r.lucchetti at univpm.it
Tue Jan 30 17:49:32 EST 2007


On Tue, January 30, 2007 23:41, Allin Cottrell wrote:
> On Tue, 30 Jan 2007, Riccardo (Jack) Lucchetti wrote:
>
>> On Tue, January 30, 2007 23:11, Allin Cottrell wrote:
>>
>>> That does make sense, but I'm a bit reluctant to change the
>>> meaning of logical "&" and "|" right now -- though we could do
>>> that later with fair warning.
>>
>> What we could do is: introduce now "&&" and "||" as synonyms of "&" and
>> "|" but issue a warning everytime the 1-char versions are found,
>> notifying users that they are deprecated (big red letters, fire alarm,
>> buzzers, flashing lights, whatever). In a year's time or so, introduce
>> "|".
>
> Yes, I think that's a good idea.  Meanwhile, do we want a
> temporary symbol for vertical concatenation, or just forget it for
> now?

IMHO there's no point in introducing an element of syntax that is going
to be dropped in a year. As far as I'm concerned, I can live with

X = ( a' ~ b' )'

for now, but I can see the point of those who disagee.

Riccardo (Jack) Lucchetti
Dipartimento di Economia
Facoltà di Economia "G. Fuà"
Ancona




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