Function kurtosis

pattern/metrics.py:617–624

Returns the degree of peakedness of the given list of values: > 0.0 => sharper peak around mean(list) = more infrequent, extreme values, < 0.0 => wider peak around mean(list), = 0.0 => normal distribution, = -3 => flat

(list)

skew = skewness

def kurtosis(list):
    """ Returns the degree of peakedness of the given list of values:
        > 0.0 => sharper peak around mean(list) = more infrequent, extreme values,
        < 0.0 => wider peak around mean(list),
        = 0.0 => normal distribution,
        =  -3 => flat
    """
    return moment(list, 4) / (moment(list, 2) ** 2.0 or 1) - 3

#a = 1
#b = 1000