[scilab-Users] Weird behaviour dealing with matrices

[Eduardo Torrecillas]

Thank you so much!

I was fooled by the pause memory level, was using it as a "debugger".

Regards,

On Tue, Jun 14, 2011 at 10:51 AM, Adrien Vogt-Schilb
<vogt at centre-cired.fr>wrote:

>  Hi
>
> are you sure you are not using "pause", for instance?
>
> pause calls a new memory level
>
>
> On 14/06/2011 15:47, Eduardo Torrecillas wrote:
>
> Hi Adrien,
>
> Thanks for your reply, but that's not exactly what I meant.
> I understand in your example we're dealing with passing variables through
> different functions. In my case, it's all inside the same function.
> Also, apparently the behaviour is erratic: it works sometimes and sometimes
> not.
>
> Regards,
>
> On Tue, Jun 14, 2011 at 10:26 AM, Adrien Vogt-Schilb <vogt at centre-cired.fr
> > wrote:
>
>>  Hi Edouardo
>>
>> This is not a bug, but a feature!
>>
>> you should read this :
>> http://wiki.scilab.org/howto/global%20and%20local%20variables
>>
>> In the commented example, look for the following line :
>>
>>   x(3)=56          // note that at this point x=[0 0 56] because of 3. above, *not* [45 0 56]
>>
>> this is exactly want happened to you
>>
>>
>>
>> On 13/06/2011 22:11, Eduardo Torrecillas wrote:
>>
>> Hi all,
>>
>> I have some piece of code and noticed some strange behaviour. As the code
>> is complex and involves external compilation, it is a little bit difficult
>> to post it here, so I will try to explain it in a general way.
>>
>> At some point in the code, I have a structure called interpolados, having
>> 3 matrices. So, I have
>>
>> interpolados(1).matriz
>> interpolados(2).matriz
>> interpolados(3).matriz
>>
>> all of them are sized 497 x 95.
>>
>> Later on, when trying to substitute a column of one of this matrices, I
>> get it destroyed.
>> The syntax I'm using is:
>>
>> interpolados(1).matriz(:,3)=13
>>
>> I was expecting to maintain the matrix and change only its third column,
>> all with 13. Actually what I'm getting is that interpolados(1).matriz is no
>> longer 497 x 95, but 497 x 1 (only 1 column, all full with 13).
>>
>> System summary: Ubuntu 10.10 64bit + Scilab 5.3.2
>>
>> Has anybody experienced that? Any issues?
>>
>> Regards,
>>
>>
>> --
>> Eduardo Torrecillas
>>
>>
>>
>>  --
>>
>> *Adrien Vogt-Schilb*
>>
>> Research Fellow
>>
>> vogt at centre-cired.fr
>>
>> Tel: (+33) 1 43 94 73 96
>>
>> Fax: (+33) 1 43 94 73 70
>>
>> [image: CIRED]
>>
>> 45 bis, Av de la Belle Gabrielle
>>
>> F-94736 Nogent-sur-Marne
>>
>> http://www.centre-cired.fr/
>>
>>
>>
>
>
>
> --
> Eduardo Torrecillas
> AER-09
>
>
>
> --
>
> *Adrien Vogt-Schilb*
>
> Research Fellow
>
> vogt at centre-cired.fr
>
> Tel: (+33) 1 43 94 73 96
>
> Fax: (+33) 1 43 94 73 70
>
> [image: CIRED]
>
> 45 bis, Av de la Belle Gabrielle
>
> F-94736 Nogent-sur-Marne
>
> http://www.centre-cired.fr/
>
>
>



-- 
Eduardo Torrecillas
AER-09
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