(xs)
return RunningMean(xs).sd
Returns the standard deviation of an iterable.

    Example:

        >>> sd([1, 4, 7, 11])       #doctest:+ELLIPSIS
        4.2720...

    @param xs: an iterable yielding numbers.
    @return: the standard deviation of the numbers provided by the iterable.

    @see: RunningMean() if you also need the mean
Returns the standard deviation of an iterable.
Returns the standard deviation of an iterable .
def sd(xs):
    """Returns the standard deviation of an iterable.

    Example:

        >>> sd([1, 4, 7, 11])       #doctest:+ELLIPSIS
        4.2720...

    @param xs: an iterable yielding numbers.
    @return: the standard deviation of the numbers provided by the iterable.

    @see: RunningMean() if you also need the mean
    """
    return RunningMean(xs).sd
def sd ( xs ) : return RunningMean ( xs ) . sd