std::gamma_distribution满足随机数分布(RandomNumberDistribution)。 模板形参 RealType-生成器所生成的结果类型。若它不是float、double或longdouble之一则效果未定义。 成员类型 成员类型定义 result_typeRealType param_type参数集的类型,见随机数分布(RandomNumberDistribution)。
geometric_distribution<IntT>g(p);//每次试验成功概率为p,默认0.5 negative_binomial_distribution<IntT>nb(k, p);//k次试验成功概率为p。k默认1,p默认0.5 泊松分布 poisson_distribution<IntT>p(x);//均值为double值x exponential_distribution<RealT> e<lam);//指数分布,lambda浮点值,默认1.0 gamma_distribu...
boost::gamma_distribution<> > generator(rng, pdf);构造随机数生成器和伽马分布，并将它们粘合在...
J站：Joint distribution联合分布：对于两个随机变量X,Y,他们联合分布的累积概率函数等于F_{X,Y}(x,y...
title(main = "Gamma distributions") legend(par("usr")[2],par("usr")[4],xjust = 1, c("k=1 (Exponential distribution)", "k=2","k=3","k=4","k=5"), lwd = c(2,2,2,2,2), lty = c(1,2,3,4,5), col = c(par("fg"),"red","green","blue","orange")) ...
形状参数theta=2.0# 尺度参数x=np.linspace(0,20,100)# 计算伽马分布的密度函数pdf=gamma.pdf(x,k,scale=theta)# 绘制图形plt.plot(x,pdf,color='blue',label=f'Gamma(k={k}, θ={theta})')plt.title('Gamma Distribution PDF')plt.xlabel('x')plt.ylabel('Density')plt.legend()plt.grid()plt....
Betais a parameter to the distribution. If beta = 1, GAMMADIST returns the standard gamma distribution. Cumulativeis a logical value that determines the form of the function. If cumulative is TRUE, GAMMADIST returns the cumulative distribution function; if FALSE, it returns the probability mass ...
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If beta = 1, GAMMAINV returns the standard gamma distribution. Remarks If any argument is nonnumeric, GAMMAINV returns the #VALUE! error value. If probability < 0 or probability > 1, GAMMAINV returns the #NUM! error value. If alpha ≤ 0 or if beta ≤ 0, GAMMAINV returns the #NUM!
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