Re: [Gretl-devel] Odd Behavior with the "append" Command
El 27/10/10 22:23, Henrique Andrade escribió:
Dear Gretl Team,
Today I'd tried to use the "append" command to add a new series to my
session. The series start at 2008/06/04 and end at 2010/10/19. They are
the same, with the exception that the second one, called "ìncompleto",
does not have the observations from July 2008 (more exactly, from
01/07/2008 to 31/07/2008).
Please take a look at the following commads:
open completo.gdt
append incompleto.gdt
The sequence above gives me a very odd result. Originally, both the series
end in 2010/10/19, but after the "append" command, the series
"incompleto"
is ending at a different date: 2010/09/16.
I hope I was clear enough. Sometimes English language is hard for me :-(.
Best regards,
Henrique C. de Andrade
Doutorando em Economia Aplicada
Universidade Federal do Rio Grande do Sul
www.ufrgs.br/ppge <http://www.ufrgs.br/ppge>
Henrique,
I remember in principle "append" was designed to add new variables with
exactly the same dates as your current dataset. But now I see in the
manual this behaviour has been flexibilized in the las times.
The manual for the append command says:
"The appended data may take the form of either additional observations
on variables already present in the dataset, or new variables. in the
case of adding variables, compatibility requires
either (a) that the number of observations for the new data equals that
for the current data, or
(b) that the new data carries clear observation information so that
gretl can work out how to place the values."
a) is the traditional way of working for the "append" command. I am sure
Allin may clarify this, but probably b) is more recent and is not much
tested. May be you have discovered a bug.
In any way, opening (directly) your file incomplete.gdt I am surprised
because, for the missing data, in displaying the values (right click and
"show values") I was expecting to see the label of the date and "NA",
but I find this:
incompleto
2008/06/04 454.76
2008/06/05 457.05
2008/06/06 460.57
2008/06/09 459.68
2008/06/10 457.57
2008/06/11 461.75
2008/06/12 461.82
2008/06/13 464.89
2008/06/16 465.95
2008/06/17 465.50
2008/06/18 467.82
2008/06/19 467.73
2008/06/20 469.86
2008/06/23 470.55
2008/06/24 471.01
2008/06/25 471.65
2008/06/26 477.66
2008/06/27 478.21
2008/06/30 476.69
2008/08/01 457.77
2008/08/04 448.58
2008/08/05 447.56
...
May be the error is in the way you have defined this series, or in the
way the series have been saved?
--
Ignacio Diaz-Emparanza
DEPARTAMENTO DE ECONOMÍA APLICADA III (ECONOMETRÍA Y ESTADÍSTICA)
UPV/EHU Avda. Lehendakari Aguirre, 83 | 48015 BILBAO
T.: +34 946013732 | F.: +34 946013754
www.ea3.ehu.es