MATLAB Functions | Help Desk |
intersect
Set intersection of two vectors
c = intersect(a,b) c = intersect(a,b,'rows') [c,ia,ib] = intersect(...)
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
. Non-vector input arrays are regarded as column vectors a = A(:)
orb = B(:)
.
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,:)
).
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
ismember
True for a set member
setdiff
Return the set difference of two vectors
setxor
Set exclusive-or of two vectors
union
Set union of two vectors
unique
Unique elements of a vector