如何使用 matplotlib 从 .txt 文件中绘制数据? [英] How can you plot data from a .txt file using matplotlib?

问题描述

我想使用matplotlib绘制txt文件，但我一直收到此错误消息.我对Python不太熟悉，因为我几周前才开始学习.文本文件的格式如下(2048 行):

I want to plot a txt file using matplotlib but I keep getting this error message. I'm not that familiar with python, as I started learning a couple of weeks ago. The text file is formatted like (it is 2048 rows long):

6876.593750  1
6876.302246  1
6876.003418  0

我想从txt中绘制数据.文件.
错误信息是[IndexError: list index out of range]

I would like to plot the data from the txt. file.
The error message is [IndexError: list index out of range]

我正在使用的代码是:

import numpy as np
import matplotlib.pyplot as plt

with open("Alpha_Particle.txt") as f:
data = f.read()

data = data.split('\n')

x = [row.split(' ')[0] for row in data]
y = [row.split(' ')[1] for row in data]

fig = plt.figure()

ax1 = fig.add_subplot(111)

ax1.set_title("Plot title")    
ax1.set_xlabel('x label')
ax1.set_ylabel('y label')

ax1.plot(x,y, c='r', label='the data')

leg = ax1.legend()

plt.show()

先谢谢你！

推荐答案

你只是读错了数据.这是一种更清洁的方法:

You're just reading in the data wrong. Here's a cleaner way:

with open('Alpha_Particle.txt') as f:
    lines = f.readlines()
    x = [line.split()[0] for line in lines]
    y = [line.split()[1] for line in lines]

x
['6876.593750', '6876.302246', '6876.003418']

y
['1', '1', '0']

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