extract union components of a vector
[v [,ka, kb] ] = union(a,b)
[v [,ka, kb] ] = union(a,b,orient)
:a vector or matrix of numbers or strings : :b vector of real numbers or strings : :orient flag with possible values : 1 or “r”, 2 or “c”. : :v row vector or matrix of numbers or strings : :ka row vector of integers : :kb 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).
A=`round`_(5*`rand`_(10,1));
B=`round`_(5*`rand`_(7,1));
union(A,B)
[N,ka,kb]=union(A,B)
union('a'+`string`_(A),'b'+`string`_(B))