MATLAB: Compare 2 arrays with find()

arrayfind

I have 2 arrays:

x = 1:1:3;
Points = [1 3 2 1 1 3 4];

I would like to use find() function comparing each element of 'Points' array with full 'x' array.

It would be similar to do:

find(Points(1) == x)
find(Points(2) == x)

… one by one, but I would like to do it at once without looping. However I get error if I do:

find(Points == x)

The ismember function may do what you want:

x = 1:1:3;
Points = [1 3 2 1 1 3 4];
[~,Out] = ismember(Points, x)

producing:

Out =
     1     3     2     1     1     3     0

Experiment with it to get the result you want.

x{1,1}=[2;1;3] ;
x{2,1}=[4;2;1;3] ;
iwant = cellfun(@sort,x,'un',0)

The ismember function does exactly that:

A=[1 2 3 4 5];
B=[1 3];
Out = ismember(A, B)
Out =
    1×5 logical array
     1   0   1   0   0