On Aug 19, 1:48 pm, Pierre <pierre.gaill...@gmail.com> wrote: > Hello, > > I would like to know how to find the difference (set operation) > between 2 arrays : > > a = array([1,2, 3,2,5,2]) > b = array([1,2]) > I want a - b = [3,5] > > Well, the equivalence of setdiff in matlab... > > I thought a.difference(b) could work, but no : AttributeError: > 'numpy.ndarray' object has no attribute 'difference' > > Thanks !
Hi, Here I have given my logic, check whether it helps for you a = [1,2, 3,2,5,2] b = [1,2] j = 0 dif = [] for i in range(len(a)) : if a[i] not in b: dif.append(a[i]) j += 1 print dif Thanks Baalu -- http://mail.python.org/mailman/listinfo/python-list