Code sample for nonlinear least squares
by Вадим Марковцев
Hello guys,
I am a developer from Russia trying very hard to learn how libgretl works. I
successfully understood the provided code example (extra/simple_client.c).
Unfortunately, LSQ is not enough and I want to use NLS. Could you please
post a code example for, I say,
y=a x^2 + b x + c
model,
x = 1, 2, 3, 4, 5, 6
y = 3, 7, 13, 21, 31, 43
data series. Particularly, how to get the values of a, b and c?
I've read http://gretl.sourceforge.net/API/gretl-Nonlinear-models.html but
it does not clarify how to write the actual code. I mean, it seems that I
should use nlspec_new<http://gretl.sourceforge.net/API/gretl-Nonlinear-models.html#nlspec-new>(),
nlspec_set_regression_function<http://gretl.sourceforge.net/API/gretl-Nonlinear-models.html#nlspec-set-r...>()
and model_from_nlspec<http://gretl.sourceforge.net/API/gretl-Nonlinear-models.html#model-from-n...>()
and I am not sure how to connect them.
Thanks,
Markovtsev Vadim.
15 years
"outfile" with parameters
by Pietro Battiston
Hello,
I'm trying to have a rapid way to output numbers to files, and wrote the
following:
# A function to dump numbers to files:
function scalar to_file(scalar numb, string format, string filename)
set echo off
set messages off
outfile filename --write
printf format, numb
outfile --close
set echo on
set messages on
return 0
end function
which however doesn't work. By trying different specifications, I think
I have understood that the "filename" parameter of "outfile" and the
"format" parameter of "printf" cannot be variables, they are parsed
directly as strings by the interpreter.
Did I understand correctly?
Is there anything I can do to solve my problem?
I do not care too much, in the end, about "format", but if there is no
way to pass an arbitraray string to "outfile" I'm clearly trying
something stupid.
Thanks in advance
Pietro
15 years
REL Unbalanced panels
by George Matysiak
*Do the GMM routines now automatically handle missing data in unbalanced
panels? Thanks.
*
15 years
Coefficient confidence intervals in console
by Oscar Soppelsa
Hi all,
I've looked for the console command to show the coefficient confidence
intervals after having estimated a GARCH model. Found anything in the
manual, could you help me, please?
I need the same output like the GUI one: variable, coefficient, (1 - alfa)%
confidence interval.
Thanks,
Oscar
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==============================
15 years
Re: [Gretl-users] A portable version of Gretl
by luigi cristini
I see... Maybe it would be a good idea for future versions to
integrate them in that kind of distribution, don't you think?
Regards
Luigi
On 14 Jul 2011 09:11:56 Pierre Chaussé wrote
>You cannot for X-12 ARIMA or Tramo/Seats. They require admin privileges.
>
> Pierre
>>On 14/07/11 05:13 AM, luigi cristini wrote:
>> Thank you Pierre!
>> I didn't know about it because I never tried the english language
>> version of "Gretl for Windows" page: italian language version of the
>> page doesn't mention this kind of file.
>> Works perfect, but now i have another problem: i can't install X-12
>> Arima and Tramo/Seats. There's a way to integrate them in this kind of
>> Gretl distribution?
>>
>> Regards
>>
>> Luigi
>> _______________________________________________
>> Gretl-users mailing list
>> Gretl-users(a)lists.wfu.edu
>> http://lists.wfu.edu/mailman/listinfo/gretl-users
>
>--
>*Pierre Chaussé*
>Assistant Professor
>Department of Economics
>University of Waterloo
15 years
Re: [Gretl-users] A portable version of Gretl
by luigi cristini
Thank you Pierre!
I didn't know about it because I never tried the english language
version of "Gretl for Windows" page: italian language version of the
page doesn't mention this kind of file.
Works perfect, but now i have another problem: i can't install X-12
Arima and Tramo/Seats. There's a way to integrate them in this kind of
Gretl distribution?
Regards
Luigi
15 years
(no subject)
by Mariusz Doszyń
Hello,
Is there a command in gretl that makes possible to omit observations with
missing values while using estimation procedures? I know that it can be also
done by using such commands as misszero, if, zeromiss and so on but maybe
there is a simpler way?
Regards,
Mariusz Doszyń
Poland
15 years
