瑞利分布

拟合和计算瑞利分布，生成该分布的随机样本

函数

`cdf`	累积分布函数
`gather`	Gather properties of Statistics and Machine Learning Toolbox object from GPU （自 R2020b 起）
`icdf`	逆累积分布函数
`iqr`	Interquartile range of probability distribution
`mean`	概率分布的均值
`median`	Median of probability distribution
`negloglik`	Negative loglikelihood of probability distribution
`paramci`	Confidence intervals for probability distribution parameters
`pdf`	概率密度函数
`plot`	Plot probability distribution object （自 R2022b 起）
`proflik`	Profile likelihood function for probability distribution
`random`	随机数
`std`	Standard deviation of probability distribution
`truncate`	Truncate probability distribution object
`var`	Variance of probability distribution

`raylcdf`	Rayleigh cumulative distribution function
`raylpdf`	瑞利概率密度函数
`raylinv`	Rayleigh inverse cumulative distribution function
`raylstat`	Rayleigh mean and variance
`raylfit`	瑞利参数估计值
`raylrnd`	瑞利随机数