[Scilab-users] convert matlab code to scilab

[Stéphane Mottelet]

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/1/c3RlcGhhbmUubW90dGVsZXRAdXRjLmZy/www.utc.fr/~mottelet>
>
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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

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