Set routines

Making proper sets

unique1d (ar1[, return_index, return_inverse])

Find the unique elements of an array.

Boolean operations

intersect1d (ar1, ar2)	Intersection returning repeated or unique elements common to both arrays.
intersect1d_nu (ar1, ar2)	Intersection returning unique elements common to both arrays.
setdiff1d (ar1, ar2)	Set difference of 1D arrays with unique elements.
setmember1d (ar1, ar2)	Return a boolean array set True where first element is in second array.
setxor1d (ar1, ar2)	Set exclusive-or of 1D arrays with unique elements.
union1d (ar1, ar2)	Union of 1D arrays with unique elements.