[Matplotlib] Ploting an exponential distribution frequency curve
Mario Figueiredo
marfig at gmail.com
Sun Apr 26 01:15:44 CEST 2015
Ok. Ermm, it seems I needed to ask to finally have an epiphany. The
problem is that defaultdict is unordered. Once I get the data ordered,
I can finally plot the curve. Although this presents another
problem...
import decimal
from random import expovariate
from collections import defaultdict
decimal.getcontext().prec = 4
Dec = decimal.Decimal
samples = 100000 # 100,000
def generate(lambd):
res = defaultdict(int)
for _ in range(samples):
res[Dec(expovariate(lambd)).quantize(Dec('0.01'))] += 1
return sorted(res.items())
results = generate(1)
x, y = zip(*results)
plot(x, y)
This works as intended. But plots a jagged curve due to the small
discrepancies normal of a random number generation.
Other than replacing the random module with the probability density
function for the exponential distribution, do you have a suggestion of
how I could smooth the curve?
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