Shen's Blog

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1.变量和数据类型 环境 使用Python 3。 变量和数据类型 数字及其运算 和c语言类似, = 是赋值运算符， / 是除法运算符， 比较特殊的是， ** 是次方运算

Posted by Shen's Blog on Monday, January 1, 0001

2.函数和库 函数 问题：1.求阶乘$\begin{aligned}n!\end{aligned}$ def fac(n): # 求阶乘 if n == 1: # 收敛条件 return 1 else: return n * fac(n

Posted by Shen's Blog on Monday, January 1, 0001

3.Numpy numpy的功能 引入Numpy的目的 为何不直接用list？ 慢 缺少数学操作 heights = [1.73, 1.68, 1.71, 1.89, 1.79] # 5人的身高 weights = [65.4, 59.2, 63.6, 88.4, 68.7] # 5人的体重 bmis = weights / heights ** 2

Posted by Shen's Blog on Monday, January 1, 0001

4.图形绘制 图形可视化是非常强大的工具 Hans Rosling的例子 Matplot from IPython.core.interactiveshell import InteractiveShell InteractiveShell.ast_node_interactivity = "last_expr" import matplotlib.pyplot as plt year = [1950, 1970, 1990, 2010] # 世界人口数据 pop = [2.519, 3.692, 5.263, 6.972] plt.plot(year, pop) # 折线图 plt.show() plt.scatter(year, pop)

Posted by Shen's Blog on Monday, January 1, 0001

Python基础 [[1.变量和数据类型]] [[2.函数和库]] [[3.Numpy]] [[4.图形绘制]]

Posted by Shen's Blog on Monday, January 1, 0001

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