PHP Manual
Statistic 函数
Probability density function of the F distribution

stats_dens_f

(PECL stats >= 1.0.0)

stats_dens_f — Probability density function of the F distribution

说明

stats_dens_f ( float $x , float $dfr1 , float $dfr2 ) : float

Returns the probability density at x, where the random variable follows the F distribution of which the degree of freedoms are dfr1 and dfr2.

参数

x: The value at which the probability density is calculated
dfr1: The degree of freedom of the distribution
dfr2: The degree of freedom 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 logistic distribution given values for the others php statistic 函数 calculates any one parameter of the negative binomial distribution given values for the others php statistic 函数 calculates any one parameter of the non central chi square 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 f distribution

关注编程学问公众号