PHP Manual
Statistic 函数
Probability density function of the Weibull distribution

stats_dens_weibull

(PECL stats >= 1.0.0)

stats_dens_weibull — Probability density function of the Weibull distribution

说明

stats_dens_weibull ( float $x , float $a , float $b ) : float

Returns the probability density at x, where the random variable follows the Weibull distribution of which the shape parameter is a and the scale parameter is b.

参数

x: The value at which the probability density is calculated
a: The shape parameter of the distribution
b: The scale parameter of the distribution

返回值

The probability density at x or FALSE for failure.

相关文章

php statistic 函数 calculates any one parameter of the beta distribution given values for the others php statistic 函数 calculates any one parameter of the uniform distribution given values for the others php statistic 函数 calculates any one parameter of the weibull distribution given values for the others php statistic 函数 probability density function of the beta distribution php statistic 函数 probability density function of the cauchy distribution php statistic 函数 probability density function of the chi square distribution php statistic 函数 probability density function of the exponential distribution php statistic 函数 probability density function of the f distribution php statistic 函数 probability density function of the gamma distribution php statistic 函数 probability density function of the laplace distribution php statistic 函数 probability density function of the logistic distribution php statistic 函数 probability density function of the normal distribution php statistic 函数 probability mass function of the binomial distribution php statistic 函数 probability mass function of the hypergeometric distribution php statistic 函数 probability density function of the negative binomial distribution php statistic 函数 probability mass function of the poisson distribution php statistic 函数 probability density function of the t distribution php statistic 函数 probability density function of the uniform distribution php statistic 函数 probability density function of the weibull distribution php statistic 函数 generates a random deviate from the non central chi square distribution

关注编程学问公众号