Re: Gretl-users Digest, Vol 21, Issue 10
by John Paravantis
>>BAD MOVE. I'd much rather have [lagged variables] readily apparent
>>on the main screen. How about offering the user an OPTION?
>>
>>
>
>I'm not ruling that out, but could you (or anyone) explain why you
>want to see lags in the main screen?
>
>With first differences, logs, or other transformations, the
>transformed variables should (obviously) be shown, because you might
>want to select them for graphing, summary statistics, or whatever.
>
Oops, my mistake. I did NOT realize we were talking about LAGS. I was
indeed refering to diffs, logs and other transformations -- with the
importance they have in econometrics (especially time series analysis),
clearly any such transformation should be readily apparent.
Here is another idea: how about showing available lags NEXT (i.e. to the
right) of the variable in case? You could even utilize a special symbol
such as a "-1", "-2" superscript/subscript to indicate that the
corresponding lag has been computed and is available for use in a model.
This WOULD I think be useful without cluttering the screen.
John Paravantis
University of Piraeus
18 years, 11 months
(no subject)
by Arnaud Bervas
Sure, but my question was rather for more general estimators than OLS or
even 2SLS with instrumental variables. I didn't intend to run a dynamic
panel regression with Arellano and Bond estimator though. Actually, I was
wondering if it would be possible to estimate Euler equations derived from a
CCAPM model for instance.I guess it's not possible to program the implied
numerical optimization with Gretl in its current state.
18 years, 11 months
questions about translation details
by Sven Schreiber
Ok, I have just done my first cvs commit (de.po) to see whether from that minute on gretl will stop
working ;-)
No seriously, before I can translate larger chunks I have some questions, because I very much
realize that I am a novice at program translation.
1) actually unrelated to translation: could it be that some menu shortcuts are doubly defined in
English gretl? Like "user's guide" and "check for updates" both receiving the u-shortcut in the help
window. (I presume lower or uppercase is irrelevant, right?)
2) Speaking about menu shortcuts, what letter to choose for menu shortcuts in the translations? Is
there a rule, or am I free to choose whatever I like? (Related info: It seems that in the existing
translation in some cases there is a shortcut in English, but not in the corresponding German string.)
3) Is it really necessary to "translate" menu separators appearing as strings? Or could they even be
marked as not requiring translation in the sources?
4) To test out the effect of the changes without building myself, are the changes automatically
included in the windows snapshot http://ricardo.ecn.wfu.edu/pub/gretl/gretl_install.exe? At what
interval is the snapshot brought up to date?
5) In the de.po file it says something about project id gretl 1.3.0.1, which sounds outdated.
Something I can/should change?
Thanks much for your help,
cheers, Sven
18 years, 11 months
problem:displaying lagged variables
by Arnaud Bervas
Hello
I had to re-install Gretl, but surprisingly, when I try to add a lagged
variable to the dataset, it's no longer displayed on the main screen (as it
used to be in my previous version). It appears in the window "Model" for
regressions though. There's no such a problem for the first difference
operator for intance. Does anyone know how to get lagged variables visible
just like the others ?
Thanks
Arnaud
18 years, 11 months
gmm
by Arnaud Bervas
is it possible to make gmm estimation using gretl ?
18 years, 11 months
forecasting garch vol
by Seung Hun Han
http://www.mathworks.com/access/helpdesk/help/toolbox/garch/forecasting10...
this data also in gretl
you should do it
open b-g
garch 1 1; Y
and i don't know how do i forecast..
forecasting future volatility...with mathlab.
I am having trouble interpreting the output of garchpred,for example,
spec = garchset('P',1,'Q',1,'TolCon',1e-6);
garchfit(spec,bg);
[coeff,errors,LLF,innovations,sigmas] = garchfit(bg);
[sigmaForecast,meanForecast] = garchpred(coeff,bg,10);
[sigmaForecast,meanForecast]
VL = coeff.K/(1-coeff.ARCH-coeff.GARCH)
newvar = sqrt(VL + (coeff.ARCH+coeff.GARCH)^[1 2 3 4 5 6 7 8 9
10]'*(sigmas(1974)^2-VL))
% this equation is refrenced Options, Future and other Derivatives 6th page
472 equation 19.13(JOHN C. HULL)
sigmaForecast =
0.3834
0.3895
0.3953
0.4008
0.4060
0.4110
0.4156
0.4200
0.4242
0.4282
>> newvar = sqrt(VL + (coeff.ARCH+coeff.GARCH).^[1 2 3 4 5 6 7 8 9
10]'*(sigmas(1974)^2-VL))
newvar =
0.3477
0.3559
0.3637
0.3710
0.3778
0.3843
0.3904
0.3961
0.4016
0.4067
>>
why two result is different.. and during 10days volatility is
mean(sigmaForecast ). is correct?
i'm still in garch world -_-; anybody help me...
18 years, 11 months
Re: Convergence is not met
by Seung Hun Han
Thank u for jack's warmthly reply.
I am a new user in gretl and also a new baby in tseries.
Previous sample data was expanded variance from time to time . So It was
hard to estimate garch model(i know now.. alpha + beta > 1 then convergence
is not met). so I decided to include more data, but I don't know how many
data is required to make properly garch model.
I was seen a book for few years ago about arima model. this model is
required at least 50 data.
q1]Please tell me how many data is requiered to estimate garch model...
just includeing data until alpha + beta < 1 ??
q] In generaly estimating a model, 60% data is estimate model's a parameter
and 40%'s data is confirm a model .. estimated model is properly estimated.
I think. in time series this model confirming method is not met...
i will waiting for more warmthly answer again.
18 years, 11 months
Convergence is not met
by Seung Hun Han
when i estimate the garch parameter of cj stock price during 1 year data
using gretl and R.
IN Gnu-R.
> garch(x,c(1,1))
***** ESTIMATION WITH ANALYTICAL GRADIENT *****
I INITIAL X(I) D(I)
1 0.389259E-03 0.100E+01
2 0.500000E-01 0.100E+01
3 0.500000E-01 0.100E+01
IT NF F RELDF PRELDF RELDX STPPAR D*STEP
NPRELDF
0 1 -0.830E+03
1 8 -0.830E+03 0.43E-06 0.95E-06 0.1E-04 0.8E+09 0.1E-05
0.36E+03
2 18 -0.831E+03 0.13E-02 0.22E-02 0.5E+00 0.2E+01 0.1E+00
0.20E+00
3 21 -0.835E+03 0.48E-02 0.43E-02 0.7E+00 0.1E+01 0.4E+00
0.63E-01
4 23 -0.836E+03 0.19E-02 0.13E-02 0.4E-01 0.2E+01 0.4E-01
0.80E-01
5 26 -0.839E+03 0.27E-02 0.31E-02 0.9E-01 0.2E+01 0.1E+00
0.13E+01
6 27 -0.839E+03 0.88E-03 0.26E-02 0.8E-01 0.2E+01 0.1E+00
0.31E+00
7 36 -0.840E+03 0.50E-03 0.12E-02 0.6E-05 0.4E+01 0.8E-05
0.74E-02
8 37 -0.840E+03 0.29E-04 0.28E-04 0.5E-05 0.2E+01 0.8E-05
0.37E-02
9 38 -0.840E+03 0.36E-06 0.18E-05 0.5E-05 0.2E+01 0.8E-05
0.35E-02
10 46 -0.841E+03 0.11E-02 0.19E-02 0.5E-01 0.8E+00 0.7E-01
0.35E-02
11 48 -0.843E+03 0.22E-02 0.22E-02 0.4E-01 0.9E+00 0.7E-01
0.15E-01
12 50 -0.846E+03 0.41E-02 0.46E-02 0.7E-01 0.1E+01 0.1E+00
0.73E-01
13 52 -0.847E+03 0.14E-02 0.19E-02 0.2E-01 0.2E+01 0.5E-01
0.11E-01
14 53 -0.848E+03 0.14E-02 0.16E-02 0.2E-01 0.2E+01 0.5E-01
0.10E-01
15 55 -0.849E+03 0.23E-03 0.29E-03 0.3E-02 0.2E+01 0.5E-02
0.57E-02
16 58 -0.849E+03 0.90E-03 0.15E-02 0.2E-01 0.1E+01 0.3E-01
0.67E-02
17 60 -0.849E+03 0.55E-04 0.13E-03 0.4E-02 0.1E+01 0.1E-01
0.27E-03
18 62 -0.849E+03 0.24E-05 0.57E-05 0.8E-03 0.8E+00 0.2E-02
0.91E-05
19 64 -0.849E+03 0.11E-06 0.20E-05 0.3E-03 0.1E+01 0.7E-03
0.30E-05
20 65 -0.849E+03 0.23E-06 0.38E-06 0.1E-03 0.9E+00 0.3E-03
0.69E-06
21 78 -0.849E+03 -0.20E-12 0.48E-13 0.1E-13 0.2E+06 0.2E-13
0.23E-06
***** FALSE CONVERGENCE *****
FUNCTION -0.849489E+03 RELDX 0.114E-13
FUNC. EVALS 78 GRAD. EVALS 21
PRELDF 0.477E-13 NPRELDF 0.231E-06
I FINAL X(I) D(I) G(I)
1 0.167570E-05 0.100E+01 0.188E+04
2 0.630399E-01 0.100E+01 0.113E+01
3 0.944707E+00 0.100E+01 0.364E+00
Call:
garch(x = x, order = c(1, 1))
Coefficient(s):
a0 a1 b1
1.676e-06 6.304e-02 9.447e-01
Warning message:
NANs... in: sqrt(pred$e)
but in gretl
The convergence criterion was not met.
i read previous article 'convergence is not met' and i know two assistence.
first. Includeing suitable indepedent variable...
but i just want analysis only 245 data
second . transfomation
this data already log-diffrential transformation. how can i saw a result.
not adjust includeing variable.
thank u for reading my dumb mail. i wait you warth answer... ^^;
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE gretldata SYSTEM "gretldata.dtd">
<gretldata name="CJ" frequency="1" startobs="1" endobs="247"
type="cross-section">
<variables count="3">
<variable name="price"
label="Stock Price"
displayname="Stock Price"
/>
<variable name="Return"
label="Return"
displayname="Return"
/>
<variable name="x"
label="x=obs"
/>
</variables>
<observations count="247" labels="false">
<obs>68300 -0.022207 1 </obs>
<obs>66800 0.008942 2 </obs>
<obs>67400 -0.007446 3 </obs>
<obs>66900 0.007446 4 </obs>
<obs>67400 0.004441 5 </obs>
<obs>67700 -0.010394 6 </obs>
<obs>67000 0.000000 7 </obs>
<obs>67000 -0.002990 8 </obs>
<obs>66800 -0.016604 9 </obs>
<obs>65700 -0.001523 10 </obs>
<obs>65600 0.000000 11 </obs>
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<obs>66800 -0.012048 15 </obs>
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<obs>65500 0.000000 17 </obs>
<obs>65500 -0.004591 18 </obs>
<obs>65200 0.000000 19 </obs>
<obs>65200 -0.003072 20 </obs>
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<obs>65800 0.013585 22 </obs>
<obs>66700 -0.016629 23 </obs>
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<obs>65000 0.007663 25 </obs>
<obs>65500 0.000000 26 </obs>
<obs>65500 0.046242 27 </obs>
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<obs>70900 0.000000 30 </obs>
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<obs>74500 -0.006734 45 </obs>
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<obs>71000 0.016760 53 </obs>
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<obs>67500 0.021979 58 </obs>
<obs>69000 0.001448 59 </obs>
<obs>69100 0.031342 60 </obs>
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<obs>69000 0.029981 66 </obs>
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<obs>72500 -0.008310 90 </obs>
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<obs>76300 -0.002625 105 </obs>
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<obs>77000 -0.027652 118 </obs>
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<obs>74700 -0.010767 120 </obs>
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<obs>72700 0.004118 122 </obs>
<obs>73000 -0.002743 123 </obs>
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<obs>71300 0.005594 128 </obs>
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<obs>121500 0.048202 245 </obs>
<obs>127500 0.030890 246 </obs>
<obs>131500 0.018833 247 </obs>
</observations>
</gretldata>
18 years, 11 months
compiling 1.5.0 on Ubuntu Breezy fails
by Vaidotas Zemlys
Hi,
I tried compiling gretl 1.5.0 on Ubuntu Breezy, and it failed:
make[1]: Entering directory `/home/mpiktas/src/gretl-1.5.0/cli'
mkdir .deps
gcc -c -g -O2 -I.. -I.. -I../lib/src -DLOCALEDIR=
\"/usr/local/share/locale\" -DHAVE_CONFIG_H gretlcli.c
gcc -g -O2 -I.. -I.. -I../lib/src -DLOCALEDIR=\"/usr/local/share/locale
\" -DHAVE_CONFIG_H -MM gretlcli.c > .deps/gretlcli.d
gcc -c -g -O2 -I.. -I.. -I../lib/src -DLOCALEDIR=
\"/usr/local/share/locale\" -DHAVE_CONFIG_H complete.c
gcc -g -O2 -I.. -I.. -I../lib/src -DLOCALEDIR=\"/usr/local/share/locale
\" -DHAVE_CONFIG_H -MM complete.c > .deps/complete.d
../libtool --mode=link gcc -o gretlcli gretlcli.o
complete.o ../lib/libgretl-1.0.la -lreadline -ltermcap
mkdir .libs
gcc -o .libs/gretlcli gretlcli.o
complete.o ../lib/.libs/libgretl-1.0.so -L/usr/lib -llapack
-lblas /usr/lib/libgfortran.so -L/usr/local/lib /usr/lib/libxml2.so -ldl
-lz -lm /usr/lib/libglib-2.0.so /usr/lib/libgmp.so -lreadline -ltermcap
-Wl,--rpath -Wl,/usr/local/lib
../lib/.libs/libgretl-1.0.so: undefined reference to `e_wsfe'
../lib/.libs/libgretl-1.0.so: undefined reference to `s_cmp'
../lib/.libs/libgretl-1.0.so: undefined reference to `do_fio'
../lib/.libs/libgretl-1.0.so: undefined reference to `s_cat'
../lib/.libs/libgretl-1.0.so: undefined reference to `s_stop'
../lib/.libs/libgretl-1.0.so: undefined reference to `s_wsfe'
../lib/.libs/libgretl-1.0.so: undefined reference to `s_copy'
collect2: ld returned 1 exit status
make[1]: *** [gretlcli] Error 1
make[1]: Leaving directory `/home/mpiktas/src/gretl-1.5.0/cli'
make: *** [cli] Error 2
Any ideas? ./configure did not find any problems. If aditional
information is needed, feel free to ask.
Vaidotas Zemlys
18 years, 11 months
Re :importing data
by Florent Bresson
I'm using the 1.5.0 version on windows XP.
Florent Bresson
On Fri, 6 Jan 2006, Florent Bresson wrote:
> In fact, it is not a question of partition. I have
found the
> solution. The problem was with the the directory in
which the file
> was located. The directory was called "bases de
données". I
> changed it into "bases de donnees" and it works
perfectly. The
> problem was with the character "é". It would be a
good idea to
> correct this in the next version of gretl
This is quite a ticklish issue. Can you tell us,
please, what
version of gretl you're using, on what platform, and
what your
"locale" setting is (on Linux you can get that by
running
/usr/bin/locale)? Thanks.
Allin Cottrell
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18 years, 11 months