標準偏差の計算
2015/8/10
Python2.7.6
import math
def calc_sd(number_list):
n = len(number_list)
m = float(sum(number_list)) / n
s1 = 0.0
for x in number_list:
a = x - m
s1 += a * a
s1 = math.sqrt(s1 / n)
return s12015/8/10
Python2.7.6
import math
def calc_sd(number_list):
n = len(number_list)
m = float(sum(number_list)) / n
s1 = 0.0
for x in number_list:
a = x - m
s1 += a * a
s1 = math.sqrt(s1 / n)
return s1