模拟色子
import pylab
import random
duration= 100
mean_inc= 0.2
std_dev_inc= 1.2

x=range(duration)
y=[]
pricetoday = 0
for i in x:
    next_data = random.normalvariate(mean_inc, std_dev_inc)
    pricetoday += next_data
    y.append(pricetoday)

pylab.plot(x, y)
pylab.xlabel("time")
pylab.ylabel("value")
pylab.show()
#通过正态分布 模拟虚拟价格增长数据