[Scilab-users] convert matlab code to scilab

[Stéphane Mottelet]

Sorry, in my answer the loop constructs "ic", not  "ia", i.e. the full 
equivalent to Matlab's "[C,ia,ic] = unique(A)" is in Scilab:

[C,ia] = unique(A)
for i=1:length(A)
     ic(i)=find(A(i)==C)
end

S.

Le 16/10/2019 à 13:19, Stéphane Mottelet a écrit :
>
> Sorry, I thought you were just asking about the tildas, not the syntax 
> of unique() in Scilab.
>
> Please see
>
> https://help.scilab.org/docs/6.0.2/en_US/unique.html
>
> vs
>
> https://fr.mathworks.com/help/matlab/ref/unique.html
>
> Matlab syntax [C,ia,ic] = unique(___)  with 3 outputs has no 
> equivalent in Scilab. i.e. in Matlab, after  [C,ia,ic] = unique(A) 
> then A=C(ic), i.e. values in ic are the indices of corresponding 
> unique value in C.  They can be recovered with the quick and dirty 
> following loop:
>
> for i=1:length(a)
>      ia(i)=find(a(i)==C)
> end
>
> S.
>
> Le 16/10/2019 à 12:10, P M a écrit :
>> [ans,ans,Minstances_hat] = unique(B(:));
>> gives:  Wrong number of output arguments.
>>
>> I also tried :
>> [Minstances_hat]  =  unique(B(:));
>> and get a vector.
>> also
>> [Minstances_hat,index]  =  unique(B(:));
>> seem to work.
>>
>>
>> However afterwards there is this line:
>> masks =  reshape(Minstances_hat-1,size(B));
>> I try to convert via:
>> mask  =  matrix(Minstances_hat-1,size(B));
>> but no success.
>>
>>
>>
>>
>>
>>
>> Am Mi., 16. Okt. 2019 um 11:50 Uhr schrieb Stéphane Mottelet 
>> <stephane.mottelet at utc.fr <mailto:stephane.mottelet at utc.fr>>:
>>
>>     Hello
>>
>>     Le 16/10/2019 à 11:46, P M a écrit :
>>>     Dear experts,
>>>
>>>     trying to convert a matlab code to scilab I come across
>>>     following line:
>>>     [~,~,Minstances_hat]  =  unique(B(:));
>>>     How to replace the "~" symbol?
>>
>>     by dummy names, e.g.
>>
>>     [ans,ans,Minstances_hat]  =  unique(B(:)); There is no equivalent mechanism in Scilab.
>>
>>>     B is the blue channel of a RGB image...hence a m x n matrix of
>>>     integers (type(B) = 8 )
>>>     Thank you,
>>>     Philipp
>>>
>>>     _______________________________________________
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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  <https://antispam.utc.fr/proxy/2/c3RlcGhhbmUubW90dGVsZXRAdXRjLmZy/antispam.utc.fr/proxy/1/c3RlcGhhbmUubW90dGVsZXRAdXRjLmZy/www.utc.fr/~mottelet>
>>
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>>
>>
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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
>
> _______________________________________________
> users mailing list
> users at lists.scilab.org
> https://antispam.utc.fr/proxy/1/c3RlcGhhbmUubW90dGVsZXRAdXRjLmZy/lists.scilab.org/mailman/listinfo/users

-- 
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

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