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From: Danielle Leblanc on 9 Jul 2010 03:42
I have vectors A B C D that have the same size. Is there any function that permits me to find the common numbers betweeb the 4. ismember works for only 2 vectors I believe.
From: Oleg Komarov on 9 Jul 2010 04:19
"Danielle Leblanc" <danielleblanc2004(a)hotmail.com> wrote in message <i16jsd$3p2$1(a)fred.mathworks.com>...
> I have vectors A B C D that have the same size. Is there any function that permits me to find the common numbers betweeb the 4. ismember works for only 2 vectors I believe.

You can use a recursive call to ismember:

function Out = recursiveIsmember(varargin)

Out = ismember(varargin{1},varargin{2});
Out = varargin{1}(Out);
varargin(1:2) = [];

if ~isempty(varargin)
Out = recursiveIsmember(Out,varargin{:});
end
end

recursiveIsmember(1:100,2:10,5:80,3:120)
ans =
5.00 6.00 7.00 8.00 9.00 10.00

Oleg
From: Oleg Komarov on 9 Jul 2010 04:51
"Oleg Komarov" <oleg.komarovRemove.this(a)hotmail.it> wrote in message <i16m1s$k97$1(a)fred.mathworks.com>...
> "Danielle Leblanc" <danielleblanc2004(a)hotmail.com> wrote in message <i16jsd$3p2$1(a)fred.mathworks.com>...
> > I have vectors A B C D that have the same size. Is there any function that permits me to find the common numbers betweeb the 4. ismember works for only 2 vectors I believe.
>
> You can use a recursive call to ismember:
>
> function Out = recursiveIsmember(varargin)
>
> Out = ismember(varargin{1},varargin{2});
> Out = varargin{1}(Out);
> varargin(1:2) = [];
>
> if ~isempty(varargin)
> Out = recursiveIsmember(Out,varargin{:});
> end
> end
>
> recursiveIsmember(1:100,2:10,5:80,3:120)
> ans =
> 5.00 6.00 7.00 8.00 9.00 10.00
>
> Oleg

The example fits your needs but I used inappropriately ismember (from a theoric point of view).
I should have used intersect (which uses ismeber).

Oleg
From: Oleg Komarov on 30 Jul 2010 11:44
"Oleg Komarov" <oleg.komarovRemove.this(a)hotmail.it> wrote in message <i16ntp$d93$1(a)fred.mathworks.com>...
> "Oleg Komarov" <oleg.komarovRemove.this(a)hotmail.it> wrote in message <i16m1s$k97$1(a)fred.mathworks.com>...
> > "Danielle Leblanc" <danielleblanc2004(a)hotmail.com> wrote in message <i16jsd$3p2$1(a)fred.mathworks.com>...
> > > I have vectors A B C D that have the same size. Is there any function that permits me to find the common numbers betweeb the 4. ismember works for only 2 vectors I believe.
> >
> > You can use a recursive call to ismember:
> >
> > function Out = recursiveIsmember(varargin)
> >
> > Out = ismember(varargin{1},varargin{2});
> > Out = varargin{1}(Out);
> > varargin(1:2) = [];
> >
> > if ~isempty(varargin)
> > Out = recursiveIsmember(Out,varargin{:});
> > end
> > end
> >
> > recursiveIsmember(1:100,2:10,5:80,3:120)
> > ans =
> > 5.00 6.00 7.00 8.00 9.00 10.00
> >
> > Oleg
>
> The example fits your needs but I used inappropriately ismember (from a theoric point of view).
> I should have used intersect (which uses ismeber).
>
> Oleg

I created this submission to meet this kind of requirement:
http://www.mathworks.com/matlabcentral/fileexchange/28341-set-functions-with-multiple-inputs

z = intersectm(a,b,c,d,...);

Oleg
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