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Matplotlib绘图24小时,间隔1小时

matplotlib python

-1

Nikko · 技术社区 · 6 年前

嗨,我现在有这个情节。现在这个图显示了每滴答声间隔3小时。我想要所有的时间从0:00到23:59或者回到0:00,即00:00,01:00,02:00。。。23:00、23:59或00:00。

import numpy as np
import matplotlib.pyplot as plt
import matplotlib.dates as md
import pandas as pd

df = pd.DataFrame({'toronto_time': ['2018-09-08 00:00:50',
                                    '2018-09-08 01:01:55',
                                    '2018-09-08 05:02:18',
                                    '2018-09-08 07:05:24',
                                    '2018-09-08 16:05:34',
                                    '2018-09-08 23:06:33'], 
                    'description': ['STATS', 'STATS', 'DEV_OL', 'STATS', 'STATS', 'CMD_ERROR']})
df['toronto_time'] = pd.to_datetime(df['toronto_time'], format='%Y-%m-%d %H:%M:%S')

fig, ax = plt.subplots(figsize=(8,6))
plt.plot('toronto_time', 'description', data=df)
ax.set_xlim(df['toronto_time'].min()-pd.Timedelta(1,'h'),
            df['toronto_time'].max()+pd.Timedelta(1,'h'))
ax.xaxis.set_major_formatter(md.DateFormatter('%H:%M:%S'))
plt.show()

1 回复 | 直到 6 年前

tda 6 年前

ax.xaxis.set_major_locator(md.HourLocator(interval = 1))

完整示例如下:

import matplotlib.pyplot as plt
import matplotlib.dates as md
import pandas as pd

df = pd.DataFrame({'toronto_time': ['2018-09-08 00:00:50',
                                    '2018-09-08 01:01:55',
                                    '2018-09-08 05:02:18',
                                    '2018-09-08 07:05:24',
                                    '2018-09-08 16:05:34',
                                    '2018-09-08 23:06:33'],
                    'description': ['STATS', 'STATS', 'DEV_OL', 'STATS', 'STATS', 
                                    'CMD_ERROR']})
df['toronto_time'] = pd.to_datetime(df['toronto_time'], format='%Y-%m-%d %H:%M:%S')

fig, ax = plt.subplots(figsize=(8,6))

plt.plot('toronto_time', 'description', data=df)
ax.set_xlim(df['toronto_time'].min()-pd.Timedelta(1,'h'),
            df['toronto_time'].max()+pd.Timedelta(1,'h'))

ax.xaxis.set_major_locator(md.HourLocator(interval = 1))
ax.xaxis.set_major_formatter(md.DateFormatter('%H:%M:%S'))

fig.autofmt_xdate()

plt.show()