[Scilab-users] scilab 6.1 crashes when trying to load big matfile (loadmatfile)

[Stéphane Mottelet]

I tried to generate such kind of data file with the following Matlab script:

c1=fillcell();
c2=fillcell();
c3=fillcell();

save("c.mat","-v7.3","c1","c2","c3")

function c = fillcell()
     c={};
     for j=1:11
         c{j}=rand(711,711,33);
     end
end

The c.mat file is 4.18GB and I managed to load it in Scilab.

How much physical memory do you have on your machine ?

S.


Le 18/06/2020 à 13:28, Antoine Monmayrant a écrit :
> Hello,
>
>
> I tried but failed to generate similar data.
> What I had was a mat file containing mainly 3 cells.
> Each Cell contains 11 hypermatrices that are 711x711x31 or 711x711x33.
> I won't have access to the machine that can play with this data in the 
> coming days, so I am not sure I can help in the short term.
>
> Antoine
>
> On 18/06/2020 13:06, Stéphane Mottelet wrote:
>> Hello Antoine,
>>
>> I made a 4Gb file with Matlab:
>>
>> >> a=rand(645,645,645);
>> >> b=rand(645,645,645);
>> >> c={a,b};
>> >> save("c.mat","-7.3","c")
>>
>> and managed to load it successfully in Scilab:
>>
>> --> loadmatfile("c.mat");
>>
>> --> c
>>  c  =
>>
>>   [645x645x645 constant]  [645x645x645 constant]
>>
>> Maybe the structure I tried is too simple (just two hypermatrices in 
>> a cell) so please give us a representative failing example.
>>
>> S.
>>
>> Le 17/06/2020 à 13:22, Antoine Monmayrant a écrit :
>>> Hello All,
>>>
>>> I cannot open large matfile in scilab (~3.4Gb).
>>> Scilab is always dying with an error message that is extremely 
>>> instructive: "Killed".
>>>
>>> It's a bit cumbersome to share this big fie, so do you have any idea 
>>> on how to investigate this issue and try to locate the root cause?
>>>
>>> As a side note, it might be a problem related to either the size of 
>>> the variables or their nature: cells containing hypermatrices.
>>> The file itself is not corrupted (I managed to open it in matlab and 
>>> to save each hypermatrix into individual files that got imported in 
>>> scilab with no problem.
>>>
>>> Cheers,
>>>
>>> Antoine
>>>
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>>>
>>
-- 
Stéphane Mottelet
Ingénieur de recherche
EA 4297 Transformations Intégrées de la Matière Renouvelable
Département Génie des Procédés Industriels
Sorbonne Universités - Université de Technologie de Compiègne
CS 60319, 60203 Compiègne cedex
Tel : +33(0)344234688
http://www.utc.fr/~mottelet