
{{alias}}( x, b )
    Computes the base `b` logarithm of a double-precision floating-point number.

    For negative `b` or `x`, the function returns `NaN`.

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

    b: number
        Base.

    Returns
    -------
    y: number
        Logarithm (base `b`).

    Examples
    --------
    > var y = {{alias}}( 100.0, 10.0 )
    2.0
    > y = {{alias}}( 16.0, 2.0 )
    4.0
    > y = {{alias}}( 5.0, 1.0 )
    Infinity
    > y = {{alias}}( NaN, 2.0 )
    NaN
    > y = {{alias}}( 1.0, NaN )
    NaN
    > y = {{alias}}( -4.0, 2.0 )
    NaN
    > y = {{alias}}( 4.0, -2.0 )
    NaN

    See Also
    --------

