matplotlib example interpolate (snippet)

Python matplotlib example 'interpolate'

Modules used in program:

import pylab as pl
import numpy as np

python interpolate

Python matplotlib example: interpolate

# -*-coding:utf-8 -*-  
import numpy as np  
from scipy import interpolate  
import pylab as pl  

x=np.linspace(0,10,11)  
#x=[  0.   1.   2.   3.   4.   5.   6.   7.   8.   9.  10.]  
y=np.sin(x)  
xnew=np.linspace(0,10,101)  
pl.plot(x,y,"ro")  

for kind in ["nearest","zero","slinear","quadratic","cubic"]:#插值方式  
    #"nearest","zero"为阶梯插值  
    #slinear 线性插值  
    #"quadratic","cubic" 为2阶、3阶B样条曲线插值  
    f=interpolate.interp1d(x,y,kind=kind)  
    # ‘slinear’, ‘quadratic’ and ‘cubic’ refer to a spline interpolation of first, second or third order)  
    ynew=f(xnew)  
    pl.plot(xnew,ynew,label=str(kind))  
pl.legend(loc="lower right")  
pl.show()

Python links

Learn Python: https://pythonbasics.org/
Python Tutorial: https://pythonprogramminglanguage.com