
{{alias}}( x, α, s, m )
    Evaluates the logarithm of the probability density function (PDF) for a
    Fréchet distribution with shape parameter `α`, scale parameter `s`, and
    location `m`.

    If provided `NaN` as any argument, the function returns `NaN`.

    If provided `α <= 0` or `s <= 0`, the function returns `NaN`.

    Parameters
    ----------
    x: number
        Input value.

    α: number
        Shape parameter.

    s: number
        Scale parameter.

    m: number
        Location parameter.

    Returns
    -------
    out: number
        Evaluated logPDF.

    Examples
    --------
    > var y = {{alias}}( 10.0, 1.0, 3.0, 5.0 )
    ~-2.72
    > y = {{alias}}( -2.0, 1.0, 3.0, -3.0 )
    ~-1.901
    > y = {{alias}}( 0.0, 2.0, 1.0, -1.0 )
    ~-0.307
    > y = {{alias}}( NaN, 0.0, 1.0 )
    NaN
    > y = {{alias}}( 0.0, NaN, 1.0 )
    NaN
    > y = {{alias}}( 0.0, 0.0, NaN )
    NaN
    // Negative scale parameter:
    > y = {{alias}}( 0.0, 0.0, -1.0 )
    NaN


{{alias}}.factory( α, s, m )
    Returns a function for evaluating the logarithm of the probability density
    function (PDF) of a Fréchet distribution with shape parameter `α`, scale
    parameter `s`, and location `m`.

    Parameters
    ----------
    α: number
        Shape parameter.

    s: number
        Scale parameter.

    m: number
        Location parameter.

    Returns
    -------
    logpdf: Function
        Logarithm of probability density function (PDF).

    Examples
    --------
    > var mylogPDF = {{alias}}.factory( 2.0, 3.0, 1.0 );
    > var y = mylogPDF( 10.0 )
    ~-3.812
    > y = mylogPDF( 2.0 )
    ~-6.11

    See Also
    --------

