union — extract union components of a vector
[v [,ka, kb] ] = union(a,b) [v [,ka, kb] ] = union(a,b,orient)
vector or matrix of numbers or strings
vector of real numbers or strings
flag with possible values : 1 or "r", 2 or "c".
row vector or matrix of numbers or strings
row vector of integers
row vector of integers
union(a,b)
returns a sorted row vector which retains the unique entries
of [a(:);b(:)]
.
union(a,b,"r")
or
union(a,b,1)
returns the matrix formed by the
union of the unique rows of a
and
b
sorted in lexicographic ascending
order. In this case matrices a
and
b
must have the same number of columns.
union(a,b,"c")
or
union(a,b,2)
returns the matrix formed by the
union of the unique columns of a
and
b
sorted in lexicographic ascending
order. In this case matrices a
and
b
must have the same number of rows.
[v,ka,kb]=union(a,b)
also returns index vectors ka
and
kb
such that v
is a sorted combination of the entries
a(ka)
and b(kb)
.