python用插值法绘制平滑曲线

# 1. 随机构造数据
import numpy as np
x = range(10)
y = np.random.randint(10,size=10)

# 2. 绘制原图
import matplotlib as mpl
import matplotlib.pyplot as plt
%matplotlib inline # jupyter notebook显示绘图
from scipy.interpolate import spline # 借助scipy库
plt.plot(x, y)
plt.show()

# 3. 绘制平滑曲线
from scipy.interpolate import spline
 # 插值法，50表示插值个数，个数>=实际数据个数，一般来说差值个数越多，曲线越平滑
x_new = np.linspace(min(x),max(x),50) 

y_smooth = spline(x, y, x_new)

plt.plot(x_new, y_smooth)

plt.show()