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std::lognormal_distribution::lognormal_distribution

性病：对数正常[医]分布：：对数正态分布[医]分布

explicit lognormal_distribution( RealType m = 0.0, RealType s = 1.0 (1)(since C++11)
explicit lognormal_distribution( const param_type& params (2)(since C++11)

构造一个新的分发对象。第一个版本使用m和s作为分发参数，第二个版本使用params作为分布参数。

参数

m-the m distribution parameter (log-scale)
s-the s distribution parameter (shape)
params-the distribution parameter set

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http：//en.cppreference.com/w/cpp/数值/随机/lognormal[医]分布/对数正态分布[医]分布

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