Ejemplo n.º 1
0
 def dist_average (c0, c1):
     return Vector.distance(avg(c0), avg(c1))
Ejemplo n.º 2
0
 def sum_of_squared_errors (self):
     normsq = lambda v : abs(Vector.norm(v, 1))
     clust_avg = lambda clst : (clst, avg(clst))
     clust_sqerr = lambda (clst, mu) : sum(normsq(v - mu) for v in clst)
     return sum( it.imap(clust_sqerr, it.imap(clust_avg, self)) )