Intersect function and setdiff function:
The intersect function rather than returns all the values which can be found in both of the input argument vectors.
>> intersect(v1,v2)
ans =
3 5
The setdiff function receives two vectors as input arguments, and returns a vector having all the values which are contained in the first vector argument but not in the second. And hence, the order of the two input arguments is very important.
>> setdiff(v1,v2)
2 4 6
>> setdiff(v2,v1)
1 7