def partD(x):
out = [0]*len(x)
h = 10**-6
f = fkt(x)
for i in range(len(x)):
tmp = x
tmp[i] = tmp[i] + h
out[i] = (fkt(tmp) - f) / h
return out
def partD(vector, radi):
out = [0]*len(vector)
h = 10**-6
f = fkt(vector, radi)
for i in range(len(vector)):
tmp = vector
tmp[i] = tmp[i] + h
out[i] = (fkt(tmp, radi) - f) / h
return out
def calcSupremum(radi):
fkt_input = []
for i in range(len(radi)):
front = radi[:i+1]
fkt_input.append(2*sum(front)) # double radius
fkt_input.append(0)
print 'vec', radi, fkt_input
return fkt(fkt_input, radi)
def searchVectorStep(x, r, b):
pdf = partD(x, r)
n = [-pdf[i] for i in range(len(x))]
n.append(1)
normN = norm(n)
if(normN == 1):
normN = normN + 0.001
n[-1] = normN ** 2 - 1
r = ((b - fkt(x, r)) * normN ** 2) / (1 - normN ** 2)
d = n / (normN ** 2)
return x + r * d[:len(x)]
def searchVectorStep(coords, radi, b):
pdf = partD(coords, radi)
n = [-pdf[i] for i in range(len(coords))]
n.append(1)
normN = norm(n)
if(normN == 1):
normN = normN + 0.001
n[-1] = normN ** 2 - 1
radi = ((b - fkt(coords, radi)) * normN ** 2) / (1 - normN ** 2)
d = n / (normN ** 2)
return coords + radi * d[:len(coords)]
