def get_amount_fractions(power, count):
"""Get 'count' fractions following power law distn according to
parameter 'power'
"""
amount_fractions = rand_pow_array(power, count)
amount_fractions = [1.0 - x for x in amount_fractions]
return [x / sum(amount_fractions) for x in amount_fractions]
def get_amount_fractions(power, count):
"""Get 'count' fractions following power law distn according to
parameter 'power'
Note that this function is not entirely generic; it ensures that
the final entry is larger than a certain fraction, for a reason
specific to the way the tumbler algo works: the last entry
corresponds to a sweep which takes the remaining coins; if this
ends up being too small, it cannot be tweaked using the mincjamount
setting, so we make sure it's appreciable to begin with.
"""
while True:
amount_fractions = rand_pow_array(power, count)
amount_fractions = [1.0 - x for x in amount_fractions]
y = [x / sum(amount_fractions) for x in amount_fractions]
#Here we insist that the last entry in the list is more
#than 5% of the total, to account for tweaks upwards
#on previous joins.
if y[-1] > 0.05:
break
return y