how to find the same elements from 2 vectors

Hi,

I have a question about intersections(same) between two victors. for example if I have vector_1=[1,2,3,4,5], Vector_2=[6,5,7,1,8] I want to be able to find the repeated elements from both vectors , in this case 1 and 5. And is it possible to put a minimum threshold or limit for what number to look for ie. above 2

Thanks in advance .....

Answer 1

[pfb]

 % this is going to find the common elements (1 and 5)
 I=intersect(vector_1,vector_2);

 % this is going to introduce the threshold (only 5 survives)
 I=I(I>2);

[Ahmed Alnahdi]

Thank you very much, just one last question, how can I locate their indices in a different matrix.

[pfb]

It's all explained in the documentation for intersect

 [I,i1,i2] = intersect(vector_1,vector_2);

will give you the indices of the common elements in vector_1 and vector_2. That is, the common elements stored in I correspond to

 vector_1(i1)

and

 vector_2(i2)

If you want to enforce the threshold, then it is probably convenient to define

 t = I>2;

and then

 I=I(t);
 i1=i1(t);
 i2=i2(t);

[Ahmed Alnahdi]

It perfectly did its job, thanks.