我有这个简单的代码来读取和绘制 .txt 文件
import sys
import os
import numpy
import matplotlib.pyplot as plt
from pylab import *
exp_sum = 'exponential_sum.txt'
Term, Absolute_error, Relative_error= numpy.loadtxt(exp_sum, unpack =True)
plt.semilogy(Term,Absolute_error, 'm^-')
plt.semilogy(Term,Relative_error, 'g-')
xlabel('Number of terms N')
ylabel('Absolute and Relative approximation error')
legend(['Absolute error', 'relative error'], loc = 'upper right')
title('Testing convergence of exponential series with respect to error vs iteration terms')
show()
到目前为止工作正常，现在它在尝试绘制这个简单的文本文件时给了我这个奇怪的错误。请帮我解决这个值错误，.txt 文件也已附上。
#Term Exponential_sum Absolute_error Relative_error
0 1.0 1.71828182846 0.632120558829
1 2.0 0.718281828459 0.264241117657
2 2.5 0.218281828459 0.0803013970714
3 2.66666666667 0.0516151617924 0.0189881568762
4 2.70833333333 0.00994849512571 0.00365984682734
5 2.71666666667 0.00161516179238 0.000594184817582
6 2.71805555556 0.00022627290349 8.3241149288e-05
7 2.71825396825 2.78602050767e-05 1.02491966745e-05
8 2.71827876984 3.05861777505e-06 1.12520259784e-06
9 2.71828152557 3.02885852843e-07 1.11425478283e-07
10 2.71828180115 2.73126605776e-08 1.00477663102e-08
11 2.7182818262 2.26055218988e-09 8.31610676352e-10
12 2.71828182829 1.72876379878e-10 6.35976660213e-11
13 2.71828182845 1.22857279905e-11 4.51966674753e-12
14 2.71828182846 8.14903700075e-13 2.99786317792e-13
15 2.71828182846 5.01820807131e-14 1.84609558095e-14
16 2.71828182846 2.22044604925e-15 8.1685645175e-16
17 2.71828182846 4.4408920985e-16 1.6337129035e-16
18 2.71828182846 4.4408920985e-16 1.6337129035e-16
19 2.71828182846 4.4408920985e-16 1.6337129035e-16
最佳答案
您正在尝试将四列解压缩为三个变量 - Exponential_sum 变量丢失!
关于python - 尝试解压 simple.txt 文件时出现 ValueError : too many values to unpack,，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39543296/