[Scilab-users] find & vectorization

[Samuel Gougeon]

Le 28/12/2016 09:16, paul.carrico at free.fr a écrit :
> Hi all
>
> I do not understand why the following code does not work when I try to
> use vectorization (many trials)?
>
> What am I doing wrong ?
>
> Thanks
>
> Paul
> ################################################################
>
> mode(0)
>
> A = [ 1 2 9 0 10 6 ; 5 3 8 8 0 9 ; 5 9 1 0 3 9]'
> v = [2 9 6]'
>
> index = zeros(3,1);
> for i = 1 : 3
>     index(i) = find(A(:,1) == v(i));
> end
> disp(index)
>
> i = [1 : 3]';
> index2 = zeros(3,1); //pause
> index2(i,1) = find(A(:,1) == v(i,1));

Actually, what you want and try to do is unclear. Even members() could 
be not appropriate.
You can easily get an error even with your unvectorized version, as soon 
as one of the v components will appears several times in A(:,1)

SG

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