Function stdev

lib/core/common.py:2501–2516

Computes standard deviation of a list of numbers. # Reference: http://www.goldb.org/corestats.html >>> "%.3f" % stdev([0.9, 0.9, 0.9, 1.0, 0.8, 0.9]) '0.063'

(values)

@cachedmethod
def stdev(values):
    """
    Computes standard deviation of a list of numbers.

    # Reference: http://www.goldb.org/corestats.html

    >>> "%.3f" % stdev([0.9, 0.9, 0.9, 1.0, 0.8, 0.9])
    '0.063'
    """

    if not values or len(values) < 2:
        return None
    else:
        avg = average(values)
        _ = 1.0 * sum(pow((_ or 0) - avg, 2) for _ in values)
        return sqrt(_ / (len(values) - 1))

def calculateDeltaSeconds(start):
    """