
{{alias}}( [mean] )
    Returns an accumulator function which incrementally computes a corrected
    sample standard deviation.

    If provided a value, the accumulator function returns an updated corrected
    sample standard deviation. If not provided a value, the accumulator function
    returns the current corrected sample standard deviation.

    If provided `NaN` or a value which, when used in computations, results in
    `NaN`, the accumulated value is `NaN` for all future invocations.

    Parameters
    ----------
    mean: number (optional)
        Known mean.

    Returns
    -------
    acc: Function
        Accumulator function.

    Examples
    --------
    > var accumulator = {{alias}}();
    > var s = accumulator()
    null
    > s = accumulator( 2.0 )
    0.0
    > s = accumulator( -5.0 )
    ~4.95
    > s = accumulator()
    ~4.95

    See Also
    --------

