[Scilab-users] Finding elements occuring once in a matrix

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Iza Iza
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[Scilab-users] Finding elements occuring once in a matrix

Hello,

Is there a simple way of finding elements of matrix which occurs only
once. For example in this matrix it would be 3 and 4:
[1 1 3
2 1 1
4 5 5]

For the time being I couldn't find any smart idea for that. Could you
help?

Kind regards,
Iza
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mottelet mottelet
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Re: Finding elements occuring once in a matrix

Hello,

Maybe not optimal, but does the job:

x = [1 1 3
2 1 1
4 5 5];

f = [];
for y=unique(x(:))'
   if length(find(x==y)) == 1
    f = [f y];
   end
end

--> f
  f  =

    2.   3.   4.

S.

Le 05/07/2019 à 18:03, Izabela Wójcik-Grząba a écrit :

> Hello,
>
> Is there a simple way of finding elements of matrix which occurs only
> once. For example in this matrix it would be 3 and 4:
> [1 1 3
> 2 1 1
> 4 5 5]
>
> For the time being I couldn't find any smart idea for that. Could you
> help?
>
> Kind regards,
> Iza
> _______________________________________________
> users mailing list
> [hidden email]
> 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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Samuel GOUGEON Samuel GOUGEON
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Re: Finding elements occuring once in a matrix

In reply to this post by Iza
Hello Izabela,

You may use the following:

--> x = [1.1 1.1 3.2; 2.3 1.1 1.1; 4.7 5.2 5.2]

  x  =
    1.1   1.1   3.2
    2.3   1.1   1.1
    4.7   5.2   5.2

--> r = tabul(x); r(r(:,2)==1,1)
  ans  =
    4.7
    3.2
    2.3

Samuel

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