3:42 p.m.
r.lucchetti(a)univpm.it @ INTERNET skrev 2007-05-22 16:10:30 :
[snip]
ceiling() whould be easy to do. However, with a bit of dexterity you
can
coerce the "int" function to do what you want; for example:
nulldata 100
x = int(uniform()*6)/2
f = int(x)
c = (x-f) ? f+1 : f
It surely would be easier to use genr y = ceiling(x)
As for "mode()", I'm all for it, provided we find a
sensible way to
handle
multi-modal variables.
Also, when we are discussing new functions, a "rank()" function for the
"genr" command, that gives the ranks of the values in a vector, with ties
resulting in ranks being averaged, would be useful.
Regards,
Andreas
3:53 p.m.
andreas.karlsson(a)ltv.se schrieb:
r.lucchetti(a)univpm.it @ INTERNET skrev 2007-05-22 16:10:30 :
[snip]
> ceiling() whould be easy to do. However, with a bit of dexterity you can
> coerce the "int" function to do what you want; for example:
>
> nulldata 100
>
> x = int(uniform()*6)/2
> f = int(x)
> c = (x-f) ? f+1 : f
It surely would be easier to use genr y = ceiling(x)
Well I guess that Jack meant that you define a reusable function that
does that.
> As for "mode()", I'm all for it, provided we find a sensible way to
handle
> multi-modal variables.
Also, when we are discussing new functions, a "rank()" function for the
"genr" command, that gives the ranks of the values in a vector, with ties
resulting in ranks being averaged, would be useful.
Again, why can't you use a user-defined function?
IMHO it's better if the developers work on implementing generic stuff,
and we users write scripts for our special needs. It may still be the
case that there are good reasons why your suggestion should be
implemented directly inside gretl, but then I would like to hear them.
(Aside from that, I wouldn't call it rank because of the rank concept in
linear algebra.)
cheers,
Sven
4:24 p.m.
On Tue, 22 May 2007, Sven Schreiber wrote:
andreas.karlsson(a)ltv.se schrieb:
> r.lucchetti(a)univpm.it @ INTERNET skrev 2007-05-22 16:10:30 :
>
> [snip]
>
> It surely would be easier to use genr y = ceiling(x)
Well I guess that Jack meant that you define a reusable function that
does that.
In this case, the overhead to the source would be minimal. But in general,
I agree with Sven that if users wrote their own functions to do stuff,
that would be very useful.
[snip]
(Aside from that, I wouldn't call it rank because of the rank
concept in
linear algebra.)
Sven is right. We already have the rank() function as a matrix function.
Changing its behaviour if the argument is a series is feasible, but I'm
wondering if the usefulness of rank() for series outweighs or not the
potential confusion that may arise. We probably should leave the decision
to the commander-in-chief (no, not THAT one).
Riccardo (Jack) Lucchetti
Dipartimento di Economia
Università Politecnica delle Marche
r.lucchetti(a)univpm.it
http://www.econ.univpm.it/lucchetti
4:02 p.m.
On Tue, 22 May 2007, andreas.karlsson(a)ltv.se wrote:
r.lucchetti(a)univpm.it @ INTERNET skrev 2007-05-22 16:10:30 :
[snip]
> ceiling() whould be easy to do. However, with a bit of dexterity you can
> coerce the "int" function to do what you want; for example:
>
> nulldata 100
>
> x = int(uniform()*6)/2
> f = int(x)
> c = (x-f) ? f+1 : f
It surely would be easier to use genr y = ceiling(x)
Agreed.
> As for "mode()", I'm all for it, provided we find a sensible way to
handle
> multi-modal variables.
Also, when we are discussing new functions, a "rank()" function for the
"genr" command, that gives the ranks of the values in a vector, with ties
resulting in ranks being averaged, would be useful.
Doh!
I realise now that you want the mode, not the corresponding observation.
How stupid of me. Sorry.
Yes, both the mode() function and the rank() function are very much
doable. Allin and I will meet next week and we'll see to it.
Riccardo (Jack) Lucchetti
Dipartimento di Economia
Università Politecnica delle Marche
r.lucchetti(a)univpm.it
http://www.econ.univpm.it/lucchetti
6200
days inactive
6201
days old
4 comments
4 participants
participants (4)
-
Allin Cottrell -
andreas.karlsson＠ltv.se -
Riccardo (Jack) Lucchetti -
Sven Schreiber