9:51 a.m.
Hello,
I think I need help to solve this problem. It is very basic, but this is
the first time I wish to run an octave script from gretl.
To learn this I created this very simple example based on Users' manual:
open data9-7
matrix xy = { PRIME, UNEMP }
mwrite(xy, "xy.mat", 1)
foreign language=Octave
xy = gretl_loadmat("xy.mat");
x = xy(:,1);
y = xy(:,2);
h = sum(x.*y);
gretl_export(h, "h.mat");
end foreign
When I try to run this from gretl, I got an error message, this one:
gretl version 2019c
Current session: 2019-07-13 11:39
? open data9-7
Read datafile D:\Programok\gretl\data\ramanathan\data9-7.gdt
periodicity: 4, maxobs: 64
observations range: 1975:1 to 1990:4
Listing 12 variables:
0) const 1) QNC 2) PRICE 3) INCOME 4) PRIME
5) UNEMP 6) STOCK 7) POP 8) WINTER 9) SPRING
10) SUMMER 11) FALL
? matrix xy = { PRIME, UNEMP }
Generated matrix xy
? mwrite(xy, "xy.mat", 1)
? foreign language=Octave
? xy = gretl_loadmat("xy.mat");
? x = xy(:,1);
? y = xy(:,2);
? h = sum(x.*y);
? gretl_export(h, "h.mat");
? end foreign
error: writing file 'C:\Users\MAJOR KLÁRA\.octave_hist': No such file or
directory
error: ignoring const execution_exception& while preparing to exit
I checked, the .octave_hist file is there. Also, when octave is running in
gui mode, it is possible to run gretltmp.m in this directory.
So it seems like the script should work unless this problem remains
unsolved.
So I am anaware, the problem is with gretl or with octave?
Is it possible that the problem is with the path (it has space and an
accented character in it)?
When I set preferences in gretl and define where octave executable is
located, which file should I choose?
octave-cli.exe
octave-cli-5.1.0.exe
Or one of the bat files?
(These are in the bin library of octave. The vbs files in octave root
definitely do not work.)
And finally, I have not found any documentation on these technical details,
this is why I need your help.
Thank you in advance,
Klára
1:18 p.m.
On Sat, 13 Jul 2019, Klára Major wrote:
[...]
The file ".octave_hist" is not something that gretl writes; it's an
octave thing. So apparently the directory name "MAJOR KLÁRA" is not
working for octave (an encoding problem, I suppose). Maybe there's
something we can do about that. We'll experiment and get back to
you.
Allin Cottrell
1:56 p.m.
On Sat, 13 Jul 2019, Klára Major wrote:
Thanks for your report. Please try the current Windows snapshot of
gretl, at https://sourceforge.net/projects/gretl/files/snapshots/
We've added some code to suppress octave's attempt at writing a
history file on exit. Hopefully this might fix the problem.
Allin
1:42 p.m.
Thank you! I checked and it does not solve the problem.
However I have been thinking and got some insights.
1. In gretl, in preferences we need to specify the executable of Octave and
I was linking the exe file.
When I changed it to the bat file, this error message disappeared. So
probably it was because I
wrongly specified preferences.
2. But it does not solve the problem. Now the error message is this:
gretl version 2019c
Current session: 2019-07-14 15:17
? open data9-7
Read datafile D:\Programok\gretl\data\ramanathan\data9-7.gdt
periodicity: 4, maxobs: 64
observations range: 1975:1 to 1990:4
Listing 12 variables:
0) const 1) QNC 2) PRICE 3) INCOME 4) PRIME
5) UNEMP 6) STOCK 7) POP 8) WINTER 9) SPRING
10) SUMMER 11) FALL
? matrix xy = { PRIME, UNEMP }
Generated matrix xy
? mwrite(xy, "xy.mat", 1)
? foreign language=Octave
? xy = gretl_loadmat("xy.mat");
? x = xy(:,1);
? y = xy(:,2);
? h = sum(x.*y);
? gretl_export(h, "h.mat");
? end foreign
? h = mread("h.mat", 1)
C:\Users\MAJOR KLÁRA\AppData\Roaming\gretl\h.mat: No such file or directory
And really, gretl_export does not make its task (but does when the script
is running in octave GUI). But this is something I am familiar with. The
octave can not write any file to disk of which the path has either space or
accented character in it. As it is in my case. (At least it was a few
versions ago, now the GUI version can handle this. I just checked now: the
command line version can not handle accented characters in the path).
Therefore any time I work with octave I create a special folder for the
project without using system libraries.
So basically I think I know what the problem is and I can not really solve
it, unless it will become possible the specify the folder exactly where
gretl works (I mean mwrite, mread, gretl_loadmat and gretl_export). Maybe
in the future?
Or the other possible solution is if it is possible to write my own
gretl_export function for octave and bypass the default version. This in
itself would give me the flexibility to handle these kind of difficulties.
Sorry for taking your time, I think the problem is in my system in general.
Thank you again very much,
Klára
Allin Cottrell <cottrell(a)wfu.edu> ezt írta (időpont: 2019. júl. 13., Szo,
15:56):
8:53 p.m.
On Sun, 14 Jul 2019, Klára Major wrote:
Thank you! I checked and it does not solve the problem.
However I have been thinking and got some insights.
Thanks for investigating this!
C:\Users\MAJOR KLÁRA\AppData\Roaming\gretl\h.mat: No such file or
directory
[...]
This could also be a problem with other third-party software on
Windows. Maybe we should let the user specify an "input_output_dir"
(that would presumably have a nice plain name!) as an alternative to
the default directory under "Users\<username>\AppData".
You could indeed write a "my_gretl_export" function which targets a
different directory. On the gretl side, mread() can read from
anywhere you like if you specify the path. It looks under
AppData\Roaming only if you set the last argument to non-zero.
Allin
12:44 a.m.
On Sun, 14 Jul 2019, Allin Cottrell wrote:
No, wait: you can already do that! The functions gretl_loadmat() and
gretl_export() have an optional second argument: set it to zero and
gretl will not force use of your AddData\Roaming subdirectory for
input and output.
<hansl>
matrix m = I(3)
mwrite(m, "c:/nice/path/m.mat")
foreign language=octave
mymat = gretl_loadmat("c:/nice/path/m.mat", 0);
mymat *= 2;
gretl_export(mymat, "c:/nice/path/mymat", 0);
end foreign
gotback = mread("c:/nice/path/mymat")
print gotback
</hansl>
(Note that forward slashes in Windows paths should be perfectly
acceptable and may work better with octave, though I haven't
verified that.)
Allin
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