42 lines
1017 B
Python
42 lines
1017 B
Python
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#!/usr/bin/env python3
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# see https://www.solipsys.co.uk/new/PowersOfTwoInLexOrder.html?sg28hn
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# compare some_stats(9) with some_stats(100). After 9, the standard
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# deviation and variance start to rise quickly.
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import statistics
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def oddities(n):
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ns = []
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for i in range(1, n+1):
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v = 2 ** i
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v = str(v)
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ns.append(v)
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ns.sort()
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return [float(v[0] + '.' + v[1:]) for v in ns]
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def evenities(n):
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ns = []
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for i in range(1, n+1):
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v = 10 ** (i / 10.)
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ns.append(v)
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return ns
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def differences(n):
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ons = oddities(n)
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ens = evenities(n)
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print(ons)
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print(ens)
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deltas = [abs(ens[i] - ons[i]) for i in range(len(ons))]
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return deltas
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def some_stats(n):
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deltas = differences(n)
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print('Min: {}'.format(min(deltas)))
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print('Avg: {}'.format(sum(deltas) / len(deltas)))
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print('Max: {}'.format(max(deltas)))
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print(' Std dev: {}'.format(statistics.stdev(deltas)))
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print('Variance: {}'.format(statistics.variance(deltas)))
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