def search_knn(self,P,x,k,maxiter=200): def pf_compare(a,b): return self.dist(x,a.x)<self.dist(x,b.x) def ans_compare(a,b): return self.dist(x,a.x)>self.dist(x,b.x) pf_seq=Heap(compare=pf_compare) pf_seq.insert(P) #prior sequence ans=Heap(k,compare=ans_compare) #ans sequence while pf_seq.counter>0: t=pf_seq.heap[1] pf_seq.delete(1) flag=True if ans.counter==k: now=t.F #print ans.heap[1].x,'========' if now != None: q=x.copy() q[now.l]=now.x[now.l] length=self.dist(q,x) if length>self.dist(ans.heap[1].x,x): flag=False else: flag=True else: flag=True if flag: tp,pf_seq,ans=self.to_leaf(t,x,pf_seq,ans) #print "=============" #ans.insert(tp) return ans
def search_knn(self, P, x, k, maxiter=200):
def pf_compare(a, b):
return self.dist(x, a.x) < self.dist(x, b.x)
def ans_compare(a, b):
return self.dist(x, a.x) > self.dist(x, b.x)
pf_seq = Heap(compare=pf_compare)
pf_seq.insert(P) #prior sequence
ans = Heap(k, compare=ans_compare) #ans sequence
while pf_seq.counter > 0:
t = pf_seq.heap[1]
pf_seq.delete(1)
flag = True
if ans.counter == k:
now = t.F
#print ans.heap[1].x,'========'
if now != None:
q = x.copy()
q[now.l] = now.x[now.l]
length = self.dist(q, x)
if length > self.dist(ans.heap[1].x, x):
flag = False
else:
flag = True
else:
flag = True
if flag:
tp, pf_seq, ans = self.to_leaf(t, x, pf_seq, ans)
#print "============="
#ans.insert(tp)
return ans
from dml.tool import Heap def cmp(aa,bb): return aa<bb a=Heap() a.insert(36) a.insert(45) a.insert(72) a.insert(30) a.insert(18) a.insert(53) a.insert(35) a.insert(48) a.insert(93) a.insert(15) print a.heap while a.counter>0: print a.heap[1] #print a.heap a.delete(1)
