15-8 同时掷三个骰子：
同时掷三个D6骰子，可能得到的最小点数为3，而最大点数为18。请通过可视化展示同时掷三个D6骰子的结果。
die.py
from random import randint
class Die():
#标识一个骰子的类
def __init__(self,num_sides=6):
#骰子为六面
self.num_sides = num_sides
def roll(self):
#返回一个位于1和骰子面数之间的随机值
return randint(1,self.num_sides)
die_visual.py
from die import Die
import pygal
#创建一个D6
die_1 = Die()
die_2 = Die()
die_3 = Die()
results = []
for roll_num in range(10000):
result = die_1.roll()+die_2.roll()+die_3.roll()
results.append(result)
print(results)
#分析结果
frequencies=[]
max_result = die_1.num_sides + die_2.num_sides+die_3.num_sides
for value in range(3,max_result+1):
frequenciey = results.count(value)
frequencies.append(frequenciey)
print(frequencies)
#对结果可视化
hist = pygal.Bar()
hist.title = "Results of rolling one D6 1000 times."
hist.x_labels = []
for aaa in range(3,19):
apws = aaa
hist.x_labels.append(apws)
hist.x_title = "Resultaaaa"
hist.y_title = "Frequency of Resultbbbb"
hist.add('D6666',frequencies)
hist.render_to_file('die_visual.svg')
15-9 将点数相乘 将点数相乘 ：同时掷两个骰子时，通常将它们的点数相加。请通过可视化展示将两个骰子的点数相乘的结果。
答案：
die.py不变
die_visual.py
from die import Die
import pygal
#创建一个D6
die_1 = Die()
die_2 = Die()
results = []
for roll_num in range(10000):
result = die_1.roll()*die_2.roll()
results.append(result)
print(results)
#分析结果
frequencies=[]
max_result = die_1.num_sides * die_2.num_sides
for value in range(1,max_result+1):
frequenciey = results.count(value)
frequencies.append(frequenciey)
print(frequencies)
#对结果可视化
hist = pygal.Bar()
hist.title = "Results of rolling one D6 1000 times."
hist.x_labels = []
for aaa in range(1,37):
apws = aaa
hist.x_labels.append(apws)
hist.x_title = "Resultaaaa"
hist.y_title = "Frequency of Resultbbbb"
hist.add('D6666',frequencies)
hist.render_to_file('die_visual.svg')
15-10 练习使用本章介绍的两个库 练习使用本章介绍的两个库 ：尝试使用matplotlib通过可视化来模拟掷骰子的情况，并尝试使用Pygal通过可视化来模拟随机漫步的情况
问题一
die.py不变
die_visual.py
import matplotlib.pyplot as plt
from die import Die
die_1 = Die()
die_2 = Die()
results = []
for roll_num in range(1000):
result = die_1.roll() + die_2.roll()
results.append(result)
print(results)
frequencies = []
max_result = die_1.num_sides + die_2.num_sides
for value in range(1, max_result + 1):
frequency = results.count(value)
frequencies.append(frequency)
print(frequencies)
plt.plot(list(range(1, max_result + 1)), frequencies, linewidth=2)
plt.title("Result of rolling me D6 1000 times.")
plt.xlabel("Result", fontsize=14)
plt.ylabel("Square of D6 1000 times")
plt.show()
问题二
