MATLAB Function Reference

intersect

Set intersection of two vectors

Syntax

• c = intersect(A,B)
  c = intersect(A,B,'rows')
  [c,ia,ib] = intersect(...)
  

Description

c = intersect(A,B) returns the values common to both A and B. The resulting vector is sorted in ascending order. In set theoretic terms, this is
A B. A and B can be cell arrays of strings.

c = intersect(A,B,'rows') when A and B are matrices with the same number of columns returns the rows common to both A and B.

[c,ia,ib] = intersect(a,b) also returns column index vectors ia and ib such that c = a(ia) and c = b(ib) (or c = a(ia,:) and c = b(ib,:)).

Examples

• A = [1 2 3 6]; B = [1 2 3 4 6 10 20];    
  [c,ia,ib] = intersect(A,B);
  disp([c;ia;ib]) 
       1     2     3     6
       1     2     3     4
       1     2     3     5
  

See Also

ismember, issorted, setdiff, setxor, union, unique

interpstreamspeed

inv