def getIntersect(orig, new):
	"""Get frac of neighbors intersecting in ambient space
	orig : Original/ambient space nearest neighbor indices, from getNeighbors()
	new : Latent/Comparison space nearest neighbor indices, from getNeighbors()
	Returns:
	frac : List of fraction of neighbors shared in new space, for each obs"""
	frac = [0]*new.shape[0]
	for i in range(new.shape[0]):
		inter = set(orig[i,:]).intersection(new[i,:])
		frac[i] = len(inter)/orig.shape[1]

	return frac