绘制直线图，确定x范围和y的范围
代码：
import matplotlib.pyplot as plt import numpy as np xpoints = np.array([0, 6]) #0-6的范围 ypoints = np.array([0, 100]) #0-100的范围 plt.plot(xpoints, ypoints) plt.show()
绘制两个点的坐标，用实心圆来标记点
代码：
import matplotlib.pyplot as plt import numpy as np xpoints = np.array([1, 8]) ypoints = np.array([3, 10]) plt.plot(xpoints, ypoints, 'o') plt.show()
绘制折线图，根据对应的x，y坐标
代码：
import matplotlib.pyplot as plt import numpy as np xpoints = np.array([1, 2, 6, 8]) ypoints = np.array([3, 8, 1, 10]) plt.plot(xpoints, ypoints) plt.show()
注意点，在不指定x坐标的时候，只有y坐标，那么x坐标随y坐标改变而改变，y连续，x的默认范围是【0，1】，y不连续，x的范围是从0开始的每次增加1的整数
y连续：
代码：
import matplotlib.pyplot as plt import numpy as np ypoints = np.array([3, 10]) plt.plot(ypoints) plt.show()
y不连续 ：
代码:
import matplotlib.pyplot as plt import numpy as np ypoints = np.array([3, 8, 1, 10, 5, 7]) plt.plot(ypoints) plt.show()
绘制正弦函数和余弦函数曲线图
代码:
import matplotlib.pyplot as plt import numpy as np x = np.arange(0,4*np.pi,0.1) # 开始,停止,步频 y = np.sin(x) z = np.cos(x) plt.plot(x,y,x,z) plt.show()
