[Matplotlib] Ploting an exponential distribution frequency curve
breamoreboy at yahoo.co.uk
Sun Apr 26 02:31:16 CEST 2015
On 25/04/2015 23:33, Mario Figueiredo wrote:
> I'm trying to plot the curve of an exponential distribution without
> much success. I'm missing something very basic I feel, but just can't
> figure it out after numerous tries, so I'm turning out to you.
> This is the function generating the frequency of individual outcomes:
> 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 res
> Trying to plot this data into a frequency curve is proving too
> challenging and I just can't understand why.
> plot(list(results.keys()), list(results.values()))
> This results in strange line graph where there is the outline of an
> exponential curve but the line crisscrosses all over the place. I
> can't understand why I am getting this graph result and not just the
> smooth line I can infer from looking at the hard data.
Anything that can hep you here
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what you can do for our language.
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