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Matplotlib绘图笔记基础直线、折线、曲线
2022-07-28 05:58:00 【獜洛橙】
目录
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
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()边栏推荐
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