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Simplify formula R = F(population)

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Denis Koronchik 2014-06-25 15:17:21 +03:00 • committed by Alex Zolotarev
parent 0f3a6b16df
commit 5770ac878f
1 changed files with 2 additions and 2 deletions
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4
tools/python/city_radius.py
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@ -42,7 +42,7 @@ def load_data(path):
print "Cities count: %d" % len(cities)
def formula(popul, base = 32, mult = 0.5):
return math.exp(math.log(popul, base)) * mult
return math.pow(popul, 1 / base) * mult
def avgDistance(approx, data):
dist = 0
@ -50,7 +50,7 @@ def avgDistance(approx, data):
dist += math.fabs(approx[x] - data[x])
return dist / float(len(data))
def findBest(popul, data, minBase = 5, maxBase = 100, stepBase = 0.1, minMult = 0.01, maxMult = 1, stepMult = 0.01):
def findBest(popul, data, minBase = 1, maxBase = 100, stepBase = 0.1, minMult = 0.01, maxMult = 1, stepMult = 0.01):
# try to find best parameters
base = minBase