Python 中的 sympy . stats . multi variablewens()函数
原文:https://www . geesforgeks . org/sympy-stats-multi variatewens-function-in-python/
借助于方法，我们可以创建一个具有多变量 Ewens 分布的离散随机变量。
**Syntax:** sympy.stats.MultivariateEwens(syms, n, theta)
**Parameters:**
**syms:** the symbol
**n:** size of the sample or the integer whose partitions are considered, a positive integer
**theta:** mutation rate, must be positive real number
**Returns:** a discrete random variable with Multivariate Ewens Distribution.
例 1 :
Python 3
# import sympy, MultivariateEwens, density, Symbol
from sympy.stats.joint_rv_types import MultivariateEwens
from sympy.stats import density
from sympy import Symbol, pprint
a = Symbol('a', positive = True)
b = Symbol('b', positive = True)
# using sympy.stats.MultivariateEwens() method
E = MultivariateEwens('E', 2, 1)
mveDist = density(E)(a, b)
pprint(mveDist)
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