我在尝试将情节的直线部分拟合为线性部分时遇到了问题。为了完成我的情节,我必须将红线延伸为直线,以便至少可以观察到它与 x 轴的交点。
我的代码是:
import matplotlib.pyplot as plt
import numpy as np
import pandas as pd
#data = pd.read_csv("LPPII_cw_2_1.csv")
#f = data["f [kHz]"]
f = (1, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 200, 500)
#h21e = data["h21e [A/A]"]
h21e = (218., 215., 210., 200., 189., 175., 165., 150., 140., 129., 120., 69., 30.)
linearf = f[-3:]
linearh = h21e[-3:]
logA = np.log(linearf)
logB = np.log(linearh)
m, c = np.polyfit(logA, logB, 1, w=np.sqrt(linearh))
y_fit = np.exp(m*logA + c)
fig, ax = plt.subplots()
ax.set_xscale('log')
ax.set_yscale('log')
ax.set_xlabel('f [kHz]')
ax.set_ylabel('h$_{21e}$ [A/A]')
ax.scatter(f, h21e, marker='.', color='k')
ax.plot(linearf, y_fit, color='r', linestyle='-')
plt.show()
我的情节是这样的: