Re: Help in porting a toolbox

[Juan Pablo Carbajal]

On Tue, May 29, 2012 at 11:59 AM, Juan Pablo Carbajal
<address@hidden> wrote:
> On Mon, May 28, 2012 at 3:07 PM, Mathieu Dubois
> <address@hidden> wrote:
>> Hello again,
>>
>> Using Octave 3.2.4 under Ubuntu 12.04.
>> octave:1> li="SepalL SepalW PetalL PetalW"
>> li = SepalL SepalW PetalL PetalW
>> octave:2> [s, c, e, n] = sscanf(li, '%s%[^ \t]');
>> octave:3> n
>> n = 0
>> octave:4> s
>> s = SepalL
>> octave:5> c
>> c =  1
>> octave:6> e
>> e =
>>
>> Again the value of n is wrong and som_read_data fails.
>>
>> Do you think I should report the bug for octave 3.2?
>>
>> ----- Mail original -----
>> De: "Mathieu Dubois" <address@hidden>
>> À: address@hidden
>> Envoyé: Lundi 28 Mai 2012 12:10:03
>> Objet: Re: Help in porting a toolbox
>>
>> Hello,
>>
>> Sorry for the delay, the weather was nice this week-end and upgrade to 
>> Ubuntu 12.04 took longuer than expected.
>>
>> I have installed Octave 3.6.1 (for the moment under 11.04) and the 
>> som_read_data function works.
>>
>> I have seen that 12.04 comes with Octave 3.2 
>> (http://askubuntu.com/questions/124731/when-will-octave-3-6-1-be-available-to-be-installed).
>>  Just to be sure I will re-run the test this afternoon.
>>
>> Mathieu
>>
>> ----- Mail original -----
>> De: "Juan Pablo Carbajal" <address@hidden>
>> À: "Mathieu Dubois" <address@hidden>
>> Cc: "Jordi Gutiérrez Hermoso" <address@hidden>, address@hidden
>> Envoyé: Vendredi 25 Mai 2012 09:15:01
>> Objet: Re: Help in porting a toolbox
>>
>> On Fri, May 25, 2012 at 7:56 AM, Mathieu Dubois
>> <address@hidden> wrote:
>>>
>>>
>>> ----- Mail original -----
>>> De: "Jordi Gutiérrez Hermoso" <address@hidden>
>>> À: "Octave-help" <address@hidden>
>>> Envoyé: Jeudi 24 Mai 2012 23:17:57
>>> Objet: Re: Help in porting a toolbox
>>>
>>> On 24 May 2012 16:35, Mathieu Dubois <address@hidden> wrote:
>>>
>>>> ----- Mail original -----
>>>> De: "Jordi Gutiérrez Hermoso" <address@hidden>
>>>> À: "Mathieu Dubois" <address@hidden>
>>>> Cc: address@hidden
>>>> Envoyé: Jeudi 24 Mai 2012 22:10:09
>>>> Objet: Re: Help in porting a toolbox
>>>>
>>>> On 24 May 2012 15:43, Mathieu Dubois
>>>> <address@hidden> wrote:
>>>>
>>>>> I wanted to port the SOM toolbox (see:
>>>>> http://www.cis.hut.fi/somtoolbox/) to Octave.
>>>> [snip]
>>>>>> I have some problems with code involving (s)scanf. I have read
>>>>>> that there are a lot of differences between Octave and Matlab in
>>>>>> this area. The problematic line can be found in som_read_data.m,
>>>>>> line 225:  [s, c, e, n] = sscanf(li, '%s%[^ \t]'); The goal of the
>>>>>> line is to read the header of a file which contains the data
>>>>>> label. The variable li (the line) contains "SepalL SepalW PetalL
>>>>>> PetalW". Under Matlab, s contains "SepalL" (the first label) and
>>>>>> the variable n (which causes the error) contains 8. Under Octave,
>>>>>> s contains the correct value but n is 0.
>>>>
>>>>> What Octave version? I just tried this example but got n = 6, not 0.
>>>>
>>>> I use Octave 3.2.4 (under Ubuntu 11.10).
>>>
>>>>Can you try a newer Octave version?
>>>
>>>>   
>>>>http://www.octave.org/wiki/index.php?title=Octave_for_GNU_Linux:_Binary_Octave_packages_for_GNU_Linux#Unofficial_binaries
>>>
>>> I have installed octave 3.6.1 for Ubuntu 11.04 (in fact I'm under 11.04 - 
>>> I'm in the process of upgrading to 12.04 :) but it fails to run:
>>> $ octave
>>> octave: /usr/lib/x86_64-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.15' 
>>> not found (required by /usr/local/lib/octave/3.6.1/liboctinterp.so.1)
>>> octave: /usr/lib/x86_64-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.15' 
>>> not found (required by /usr/local/lib/octave/3.6.1/liboctave.so.1)
>>> octave: /usr/lib/x86_64-linux-gnu/libgfortran.so.3: version `GFORTRAN_1.4' 
>>> not found (required by /usr/local/lib/octave/3.6.1/libcruft.so.1)
>>>
>>> Any solution?
>>>
>>>>>> Is there a way to know you're under octave (something like a
>>>>>> ISOCTAVE variable)? That would be a simple way to write
>>>>>> conditionnal code like
>>>>
>>>>>> if exists('ISOCTAVE')
>>>>>>  % Octave specific code
>>>>>> else
>>>>>>  % Matlab specific code
>>>>>> end
>>>>
>>>>> If you need to do this, then you have almost surely found an Octave
>>>>> bug. Please report it:
>>>>
>>>>>   http://www.gnu.org/software/octave/bugs.html
>>>> I don't do that! I was wondering if it would be a way to work aroud the 
>>>> bug.
>>>
>>>> No, yes, *please* report bugs if you find them. We can't make Octave
>>>> better if we don't even know what's wrong with it.
>>>
>>> Maybe I have not understood your message. You think it's a bug because we 
>>> are supposed to have the same behavior as Matlba, right?
>>> In that case, an if that persists with newer version, I will report it with 
>>> pleasure.
>>>
>>> - Jordi G. H.
>>> _______________________________________________
>>> Help-octave mailing list
>>> address@hidden
>>> https://mailman.cae.wisc.edu/listinfo/help-octave
>>> _______________________________________________
>>> Help-octave mailing list
>>> address@hidden
>>> https://mailman.cae.wisc.edu/listinfo/help-octave
>>
>> Hi,
>>
>> It looks like the problem is that those packages where built long ago
>> and now you have newer versions of the libraries. Since those aren't
>> good packages they can't check. I suggest you give it a try compiling
>> it yourself.
>> follow the instructions here
>> http://www.gnu.org/software/octave/doc/interpreter/Installation.html#Installation
>>
>> If you find any errors, check here some Ubuntu specific explanations.
>> ther eis no hack involved just calling 'sudo apt-get install', quite
>> easy.
>> http://octave.org/wiki/index.php?title=Octave_for_GNU_Linux:_Binary_Octave_packages_for_GNU_Linux#Ubuntu
>>
>> Cheers,
>>
>>
>> --
>> M. Sc. Juan Pablo Carbajal
>> -----
>> PhD Student
>> University of Zürich
>> http://ailab.ifi.uzh.ch/carbajal/
>> _______________________________________________
>> Help-octave mailing list
>> address@hidden
>> https://mailman.cae.wisc.edu/listinfo/help-octave
>> _______________________________________________
>> Help-octave mailing list
>> address@hidden
>> https://mailman.cae.wisc.edu/listinfo/help-octave
>
> Hi,
>
> First of all, answer all mails at the bottom. That makes easier the
> life of people getting into the thread.
>
> Second, the current version of octave is 3.6.1, if the problem is not
> present there then it was fixed. Do not report a bug on an older
> version unless it can be reproduced in the latest one.
>
> Switch to 3.6.1! :D
>
>
> --
> M. Sc. Juan Pablo Carbajal
> -----
> PhD Student
> University of Zürich
> http://ailab.ifi.uzh.ch/carbajal/



-- 
M. Sc. Juan Pablo Carbajal
-----
PhD Student
University of Zürich
http://ailab.ifi.uzh.ch/carbajal/