PHP - Manual: stats_cdf_weibull
2024-12-27
(PECL stats >= 1.0.0)
stats_cdf_weibull — Calculates any one parameter of the Weibull distribution given values for the others
$par1
, float $par2
, float $par3
, int $which
) : float
Returns the cumulative distribution function, its inverse, or one of its parameters,
of the binomial distribution. The kind of the return value and parameters
(par1
, par2
, and par3
)
are determined by which
.
The following table lists the return value and parameters by which
.
CDF, x, k, and lambda denotes cumurative distribution function, the value of the random variable,
the shape and the scale parameter of the Weibull distribution, respectively.
which |
Return value | par1 |
par2 |
par3 |
---|---|---|---|---|
1 | CDF | x | k | lambda |
2 | x | CDF | k | lambda |
3 | k | x | CDF | lambda |
4 | lambda | x | CDF | k |
par1
The first parameter
par2
The second parameter
par3
The third parameter
which
The flag to determine what to be calculated
Returns CDF, x, k, or lambda, determined by which
.
官方地址:https://www.php.net/manual/en/function.stats-cdf-weibull.php