def __init__(self, n, delta):
delta_filter = delta / 2.0
delta_decode = delta / 2.0
self.s = 3 * (1 - int(math.ceil(math.log(delta_filter, 2))))
self.k = (1 + int(math.ceil(math.log(n))))
# print "RecGeneral({0})".format(self.k)
self.n = n
self.h = HashK(n**3, self.s)
self.sketch = [
RecS(self.n, self.s, delta_decode) for i in xrange(self.k)
]
def __init__(self, n, delta):
delta_filter = delta / 2.0
delta_decode = delta / 2.0
self.s = 3 * (1 - int(math.ceil(math.log(delta_filter, 2))))
self.k = (1 + int(math.ceil(math.log(n))))
# print "RecGeneral({0})".format(self.k)
self.n = n
self.h = HashK(n**3, self.s)
self.sketch = [RecS(self.n, self.s, delta_decode) for i in xrange(self.k)]
def __init__(self, n, s, delta):
delta_collision = delta / 2.0
self.cnt = 0
self.n = n
self.s = s
self.k = 1 - 2 * int(math.ceil(math.log(delta_collision, 2)))
# print "RecS({0}, {1})".format(self.s, self.k)
delta_decoder = delta / (2.0 * self.k * self.s)
self.sketch = [[Rec1(n, delta_decoder) for j in xrange(2 * s)]
for i in xrange(self.k)]
self.hashes = [HashK(2 * s) for i in xrange(self.k)]
class RecGeneral:
def __init__(self, n, delta):
delta_filter = delta / 2.0
delta_decode = delta / 2.0
self.s = 3 * (1 - int(math.ceil(math.log(delta_filter, 2))))
self.k = (1 + int(math.ceil(math.log(n))))
# print "RecGeneral({0})".format(self.k)
self.n = n
self.h = HashK(n**3, self.s)
self.sketch = [
RecS(self.n, self.s, delta_decode) for i in xrange(self.k)
]
def copy(self):
result = RecGeneral(self.n, 1.0)
result.s = self.s
result.k = self.k
result.n = self.n
result.h = self.h
result.sketch = [self.sketch[i].copy() for i in xrange(self.k)]
return result
def update(self, ind, val):
for i in xrange(self.k):
if self.h.at(ind) % (2**i) == 0:
self.sketch[i].update(ind, val)
def sample(self):
for i in xrange(self.k):
result = self.sketch[self.k - 1 - i].recover()
if len(result) > 0:
ind = random.choice(result.keys())
return ind, result[ind]
return 0, 0
def sum(self, rhs):
result = self.copy()
result.sketch = [
self.sketch[i].sum(rhs.sketch[i]) for i in xrange(rhs.k)
]
return result
class RecGeneral:
def __init__(self, n, delta):
delta_filter = delta / 2.0
delta_decode = delta / 2.0
self.s = 3 * (1 - int(math.ceil(math.log(delta_filter, 2))))
self.k = (1 + int(math.ceil(math.log(n))))
# print "RecGeneral({0})".format(self.k)
self.n = n
self.h = HashK(n**3, self.s)
self.sketch = [RecS(self.n, self.s, delta_decode) for i in xrange(self.k)]
def copy(self):
result = RecGeneral(self.n, 1.0)
result.s = self.s
result.k = self.k
result.n = self.n
result.h = self.h
result.sketch = [self.sketch[i].copy() for i in xrange(self.k)]
return result
def update(self, ind, val):
for i in xrange(self.k):
if self.h.at(ind) % (2**i) == 0:
self.sketch[i].update(ind, val)
def sample(self):
for i in xrange(self.k):
result = self.sketch[self.k - 1 - i].recover()
if len(result) > 0:
ind = random.choice(result.keys())
return ind, result[ind]
return 0, 0
def sum(self, rhs):
result = self.copy()
result.sketch = [self.sketch[i].sum(rhs.sketch[i]) for i in xrange(rhs.k)]
return result
