July 2008 - Gretl-users - gretlml.univpm.it

by Allin Cottrell

Current gretl CVS and the Windows snapshot at http://ricardo.ecn.wfu.edu/pub/gretl/gretl_install.exe contain release candidate 1 for gretl 1.7.6. Please note that this version involves a backward-incompatible change with respect to gretl 1.7.5 and earlier, affecting user-defined functions that (a) take a named list of variables as an argument and (b) do things with the list-member variables by means of a "foreach" loop on the list. I won't go into the rationale for this change here. Anyone who wants the details may look at the proceedings on the gretl-devel list for July, which were mostly taken up with this issue: http://lists.wfu.edu/pipermail/gretl-devel/2008-July/thread.html There's also a brief discussion in the chapter of the User's Guide that deals with user-defined functions. But here's the bottom line for users: * If you want to "get hold of" a list-member variable in the context noted above, you have to use the syntax listname.varname, where listname is the name of the list in question and varname is the name of the list member. (This is required only if you're working with a list that was supplied as a function argument.) Trivial example: inside a function, creating new variables which are the cubes of the members of an original list, xlist, where xlist is an argument to the function. Old style: loop foreach i xlist $i_3 = $i^3 endloop New style: loop foreach i xlist $i_3 = (xlist.$i)^3 endloop In the new scheme, "$i" gets the name of the list-member variable alright, but the variable is not "visible" under that name within the function. So on the right-hand side of the expression that creates the cubes, we need "(xlist.$i)^3". (Well, actually the parentheses are not required, but wearing your seatbelt is in general a good idea.) Although this may affect quite a large number of existing functions, we believe the effects are localized and the update should be trivial. If anyone has a function for which the update is _not_ trivial, please let us know. Allin Cottrell.

14 years, 7 months

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Re: [Gretl-users] ANOVA

by andreas.rosenblad＠ltv.se

geno83(a)gmail.com @ wrote 2008-04-17 19:12:44 : > Hello > > I'm working on ANOVA. I want put one way Anova and two way Anova to gretl. > I made first version of one way ANOVA. It is still test version, but > it's working. > You can download sources and test it. > I will be glad if you put ANOVA to gretl official version. > Very good. ANOVA is one of the features I have missed in gretl. I hope that you will continue to contribute code to gretl. Best regards, Andreas

16 years, 8 months

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Using Gretl 1.6.5 on Mac OS Leopard

by Arun Tangirala

Dear All, Thank you for providing the image file for Gretl 1.6.5. However, when I load the application on Leopard, I receive the following error (with a crash): ======================= Process: gretl_x11 [62486] Path: /Applications/Utilities/Gretl.app/Contents/Resources/ bin/gretl_x11 Identifier: gretl_x11 Version: ??? (???) Code Type: PPC (Native) Parent Process: Gretl [62484] Date/Time: 2008-07-29 20:55:27.677 +0530 OS Version: Mac OS X 10.5.4 (9E17) Report Version: 6 Exception Type: EXC_BREAKPOINT (SIGTRAP) Exception Codes: 0x0000000000000001, 0x000000008fe0105c Crashed Thread: 0 Dyld Error Message: Library not loaded: /usr/lib/libiconv.2.dylib Referenced from: /usr/X11R6/lib/libXft.2.dylib Reason: Incompatible library version: libXft.2.dylib requires version 7.0.0 or later, but libiconv.2.dylib provides version 5.0.0 ================= I guess this has got to do with the compatibility issues between the libraries in Tiger and Leopard. I have Xcode installed and it has both directories for Tiger and Leopard under SDKs. I also ran otool on /usr/ lib/libiconv.2.dylib and here is the output: /usr/lib/libiconv.2.dylib: /usr/lib/libiconv.2.dylib (compatibility version 7.0.0, current version 7.0.0) /usr/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current version 1.0.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 111.0.0) So I really do not see the issue, however Gretl does see an issue! :(. The otool output on the dylib under MacOS10.4u.sdk/usr/lib shows compatibility only with 5.0.0. However, Gretl seems to have a complaint with /usr/lib/libiconv.2.dylib. I am puzzled. Can someone please help? I would be really grateful! thank you very much. best regards Arun ========================= Arun Tangirala Assistant Professor Department of Chemical Engineering IIT Madras, Chennai 600036 Ph: 91-44-22574181 Fax: 91-44-22574152 =========================

16 years, 9 months

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gretl 1.7.6 release

by Allin Cottrell

For those on the gretl-announce list: sorry for the repetition. http://gretl.sourceforge.net/ -- Allin Cottrell Department of Economics Wake Forest University, NC

16 years, 9 months

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Standard error of OLS residuals

by mamarini＠istat.it

Hi, estimating a simple OLS I get a different standard error than expected. The formula is simply ((res'*res)/n)^(1/2), isn't it? Making the calculation outside Gretl I achieve a different result. The version is 1.7.5 released last June. Thanks! Marco Marini

16 years, 10 months

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Re: gretl crashes again

by Artur Tarassow

Hello, I downloaded the latest snapshot today (built: 2008-07-20). Until now the problem seems to be solved on my Windows machine. I have no problems to open old sessions. Thanks for your efforts! Artur

16 years, 10 months

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Grahps closed out when running scripts to draw multiple seperate graphs

by Rebecca Zhang

Hi, When I run scripts in console to create several seperate time series, the graphs flashed and disappear. Then I tried to run in script, but I didn't see the output graphs come out. Does someone try to do the same thing before? Thank you! Regards, Rebecca

16 years, 10 months

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Durbin Watson test not work on daily data

by Rebecca Zhang

Hi, Somehow gretl didn't run the durbin watson test on the daily data, but it ran on the monthly data. Does someone know why it behaves like that? Thank you! Regards, Rebecca

16 years, 10 months

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Gretl for Mac

by Manuel Gerardo Chávez Angeles

Hello, I installed Gretl on my Mac (10.4). I also installed XDrawin. I can open Gretl by double clicking and following the documentation I tried to do it from the xterm in XDarwin. After typing ./gretl I received the following message: ordenador-de-manuel-gerardo-chavez-angeles:/Applications/Gretl.app/ Contents/Resources/bin manolo$ ./gretl Couldn't read /Users/manolo/.gretl2rc Segmentation fault ordenador-de-manuel-gerardo-chavez-angeles:/Applications/Gretl.app/ Contents/Resources/bin manolo$ "segmentation fault"? Any feedback Manolo

16 years, 10 months

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Re: ARIMA cracks

by Riccardo (Jack) Lucchetti

On Mon, 21 Jul 2008, bulent.miran(a)ege.edu.tr wrote: > Hi, > You might remember me for the Gretl cracks during ARIMA. In new Gretl at > http://ricardo.ecn.wfu.edu/pub/gretl/, > > 20-Jul-2008 10:33, > > again i had Gretl cracks. Whenever I wanted to make ARIMA estimation, i > got the failure message as attached. I used the data from Gujarati, > Table_21.1.gdt. The same failure happened in other friends' gretl too. Confirmed, thanks. A fix is now in CVS. Allin: the problem was happening when building the 3-D fitted/actual plot in the function add_vars_to_plot_menu() in gui2/gui_utils.c, and was related to the presence of the separator in the command list. I added a check to make sure that the double_underscores() function isn't applied to LISTSEP, but maybe there's a better way to deal with this. (Of course, lists with separators shouldn't be banned outright, since we may have tsls or similar.) Riccardo (Jack) Lucchetti Dipartimento di Economia Università Politecnica delle Marche r.lucchetti(a)univpm.it http://www.econ.univpm.it/lucchetti

16 years, 10 months

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Gretl-users July 2008