# stats_dens_chisquare

(PECL stats >= 1.0.0)

stats_dens_chisquare — Probability density function of the chi-square distribution

### 说明

stats_dens_chisquare ( float `$x` , float `$dfr` ) : float

Returns the probability density at `x`, where the random variable follows the chi-square distribution of which the degree of freedom is `dfr`.

### 参数

`x`

  The value at which the probability density is calculated

`dfr`

  The degree of freedom of the distribution

### 返回值

The probability density at `x` or `FALSE` for failure.