Re: Problem with ginput

[Matthias Brennwald]

On Dec 10, 2009, at 1:26 PM, Ben Abbott wrote:

> On Dec 10, 2009, at 2:19 AM, Matthias Brennwald wrote:
> 
>> On Dec 9, 2009, at 1:53 PM, Ben Abbott wrote:
>> 
>>>> Dear all
>>>> 
>>>> I have a problem using the ginput command with Octave 3.2.3 on Windows  
>>>> XP (I did the same on a Mac running Mac OS X, where everything worked  
>>>> as expeced). Using ginput results in warnings and never returns any  
>>>> result. Here's an example:
>>>> 
>>>> --------------
>>>> octave.exe:5:~\Desktop
>>>>> gnuplot_binary
>>>> ans = C:\Octave\3.2.3_gcc-4.4.0\bin\gnuplot.exe
>>>> octave.exe:6:~\Desktop
>>>>> version
>>>> ans = 3.2.3
>>>> octave.exe:7:~\Desktop
>>>>> which ginput
>>>> `ginput' is a function from the file C:\Octave\3.2.3_gcc-4.4.0\share 
>>>> \octave\packages\plot-1.0.7\ginput.m
>>>> octave.exe:8:~\Desktop
>>>>> plot (rand(1,10))
>>>> octave.exe:9:~\Desktop
>>>>> ginput (1)
>>>> warning: implicit conversion from real matrix to real scalar
>>>> warning: implicit conversion from real matrix to real scalar
>>>> warning: implicit conversion from real matrix to real scalar
>>>> warning: implicit conversion from real matrix to real scalar
>>>> [THINGS SEEM TO BE STUCK HERE. THE ONLY WAY TO EXIT FROM GINPUT AT  
>>>> THIS POINT SEEMS TO BE CTRL-C.]
>>>> --------------
>>>> 
>>>> I don't know what to do to fix this. Is this a but or am I doing  
>>>> something in the wrong way? I'd appreciate any help.
>>>> 
>>>> Matthias
>>> 
>>> Matthias, can you tell us what version of gnuplot you're using? You can get 
>>> that info by type "__gnuplot_version__" at Octave's prompt.
>>> 
>>> I don't have a windows machine to test this on, but this problem may have 
>>> been fixed.
>>> 
>>> The prior discussion is at this link.
>>> 
>>>     http://old.nabble.com/Ginput-doesn't-work-in-3.2.3-to26470943.html
>>> 
>>> The changeset is linked to below.
>>> 
>>>     http://hg.savannah.gnu.org/hgweb/octave/rev/fea3d4868692
>>> 
>>> Can someone confirm this change fixed the problem?
>>> 
>>> Ben
>> 
>> Dear Ben, dear all
>> 
>> I believe the above change to __go_draw_figure__.m does not fix my issue. I 
>> applied the change by hand (I don't know how to use the programs that were 
>> made for this...), but I still get the very same behavior from ginput(). 
>> Maybe I did not apply the change properly. So:
>> 
>> - Can someone send me a properly patched version of the file?
>> 
>> - Can someone confirm if the ginput() issue does (not) occur on his/her 
>> setup (Windows XP, Octave 3.2.3 and gnuplot 4.3, downloaded from 
>> http://octave.sourceforge.net ).
>> 
>> Thanks
>> Matthias
> 
> I have modified a version of __gnuplot_ginput__.m which inserts to "unset 
> multiplot" command into the gnuplot stream prior to asking for coordinates. 
> Please try using it on both your Mac and PC.
> 
> Be sure to cd to the directories containing the modified version and try ...
> 
>       [x, y, m] = __gnuplot_ginput__ (gcf, 1)
> 
> If it doesn't work, try to restore the path to its original default (in case 
> there is a conflict between an octave core function and a local one)
> 
>       restoredefaultpath
>       [x, y, m] = __gnuplot_ginput__ (gcf, 1)
> 
> If it still doesn't work, try "debug_on_warning" to determine what line is 
> producing the warning.
> 
>       debug_on_warning
>       [x, y, m] = __gnuplot_ginput__ (gcf, 1)
> 
> Ben

I tried this on both my Mac and a Windows XP box. It worked without a flaw on 
the Mac, but not on Windows:

-------------
octave-3.2.3.exe:4:~\Desktop
> plot(sin(1:10))
octave-3.2.3.exe:5:~\Desktop
> __gnuplot_ginput__(gcf,1)
[HERE I TRIED CLICKING AND PRESSING KEYS ON THE FIGURE, BUT IT DID NOT EXIT 
UNTIL I HIT CTRL-C]
octave-3.2.3.exe:5:~\Desktop
> restoredefaultpath
ans = 
C:\Octave\3.2.3_gcc-4.4.0\libexec\octave\3.2.3\site\oct\i686-pc-mingw32;C:\Octave\3.2.3_gcc-4.4.0\libexec\octave\site\oct\api-v37\i686-pc-mingw32;C:\Octave\3.2.3_gcc-4.4.0\libexec\octave\site\oct\i686-pc-mingw32;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\site\m;C:\Octave\3.2.3_gcc-4.4.0\share\octave\site\api-v37\m;C:\Octave\3.2.3_gcc-4.4.0\share\octave\site\m;C:\Octave\3.2.3_gcc-4.4.0\share\octave\site\m\startup;C:\Octave\3.2.3_gcc-4.4.0\libexec\octave\3.2.3\oct\i686-pc-mingw32;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\audio;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\deprecated;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\elfun;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\general;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\geometry;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\help;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\image;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\io;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\linear-algebra;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\miscellaneous;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\optimization;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\path;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\pkg;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\plot;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\polynomial;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\set;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\signal;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\sparse;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\specfun;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\special-matrix;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\startup;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\statistics;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\statistics\base;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\statistics\distributions;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\statistics\models;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\statistics\tests;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\strings;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\testfun;C:\Octave\3.2.3_gcc-4.4.0\share\octave\3.2.3\m\time
octave-3.2.3.exe:6:~\Desktop
> __gnuplot_ginput__(gcf,1)
error: A(I) = X: X must have the same size as I
error: called from:
error:   C:\Documents and Settings\Matthias 
Brennwald\Desktop\__gnuplot_ginput__.m at line 152, column 5
octave-3.2.3.exe:6:~\Desktop
> debug_on_warning
ans = 0
octave-3.2.3.exe:7:~\Desktop
> __gnuplot_ginput__(gcf,1)
error: A(I) = X: X must have the same size as I
error: called from:
error:   C:\Documents and Settings\Matthias 
Brennwald\Desktop\__gnuplot_ginput__.m at line 152, column 5
octave-3.2.3.exe:7:~\Desktop
-------------

Does this help somehow?

Matthias


----
Matthias Brennwald, Käferholzstrasse 173, CH-8046 Zürich, +41 44 364 17 03