一尘不染

Python-用PyPlot绘制平滑线

python

我有以下绘制图形的简单脚本:

import matplotlib.pyplot as plt
import numpy as np

T = np.array([6, 7, 8, 9, 10, 11, 12])
power = np.array([1.53E+03, 5.92E+02, 2.04E+02, 7.24E+01, 2.72E+01, 1.10E+01, 4.70E+00])

plt.plot(T,power)
plt.show()

就目前而言,这条线从一条直线到另一条直线看起来不错,但在我看来可能会更好。我想要的是使两点之间的线变得平滑。在Gnuplot中,我会用绘制smooth cplines

在PyPlot中有一种简单的方法吗?我找到了一些教程,但是它们看起来都相当复杂。


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2020-02-23

共1个答案

一尘不染

你可以scipy.interpolate.spline自己整理数据:

from scipy.interpolate import spline

# 300 represents number of points to make between T.min and T.max
xnew = np.linspace(T.min(), T.max(), 300)  

power_smooth = spline(T, power, xnew)

plt.plot(xnew,power_smooth)
plt.show()

scipy 0.19.0中不推荐使用spline,请改用BSpline类。

从切换splineBSpline复制并不是简单的复制/粘贴操作,需要进行一些调整:

from scipy.interpolate import make_interp_spline, BSpline

# 300 represents number of points to make between T.min and T.max
xnew = np.linspace(T.min(), T.max(), 300) 

spl = make_interp_spline(T, power, k=3)  # type: BSpline
power_smooth = spl(xnew)

plt.plot(xnew, power_smooth)
plt.show()
2020-02-23