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利用numpy创建并访问数组引入numpy包：import numpy as np创建np数组a = np.array([1,2,3,4])#b = np.array([1,2,3,4],[5,6,7,8]) #报错c = np.array([[1,2,3,4],[4,5,6,7],[7,8,9,10]])c1 = np.array(([1,2,3,4],[4,5,6,7],[7,...

python常用绘图示例plot绘制曲线图import numpy as npimport matplotlib.pyplot as pltx = np.linspace(0, 10, 1000)y = np.sin(x)z = np.cos(x**2)plt.figure(figsize=(8,4))plt.plot(x,y,label="$sin(x)$",color="r...