我找不到将熊猫时间戳转换为 matplotlib 图的日期的方法

Posted 2023-03-11

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【中文标题】我找不到将熊猫时间戳转换为 matplotlib 图的日期的方法【英文标题】：I can't find a way to convert a pandas timestamp into a date for a matplotlib graph 【发布时间】：2020-03-12 10:29:27 【问题描述】：

过去几天我尝试了无数次，但似乎找不到解决方案。

这是我的当前代码和一些 cmets：

import matplotlib.pyplot as plt
import pandas as pd
import matplotlib.dates as mdates
import datetime
import pandas_datareader.data as web
import matplotlib.ticker as ticker
from mpl_finance import candlestick2_ohlc
from matplotlib.dates import (MONDAY, DateFormatter, MonthLocator,
                              WeekdayLocator, date2num)



# Define start and end date
end = datetime.datetime.now()
start = end - datetime.timedelta(days=63)

# Load data for the specific stock
quotes = web.DataReader('AAPL', 'yahoo', start, end)
quotes['Date'] = quotes.index
# Order the dataframe
quotes = quotes[['Date','Open', 'High', 'Low', 'Close']]
#          2019-09-16  217.729996  220.130005  217.559998  219.899994    

fig, ax = plt.subplots()
candlestick2_ohlc(  ax,
                    quotes['Open'], 
                    quotes['High'],
                    quotes['Low'], 
                    quotes['Close'],
                    width=0.5,
                    colorup='g',
                    colordown='r')

#ax.xaxis.set_major_locator(ticker.MaxNLocator(8))#I was just testing with this

def mydate(x,pos):
    try: 
        a = quotes['Date'][int(x)]
        # print(a) --> 2019-11-04 00:00:00  
        # type(a) --> <class 'pandas._libs.tslibs.timestamps.Timestamp'>
        a = pd.to_datetime(a) # doesn't work
        return a
    except IndexError:
        return ''

ax.xaxis.set_major_formatter(ticker.FuncFormatter(mydate))

fig.autofmt_xdate()
fig.tight_layout()        
plt.show()

这是输出：

如您所见，它显示的日期如下：2019-11-04 00:00:00

我的目标是这样显示日期：

我已经尽可能地清理了代码，使其更易于阅读和理解。

【问题讨论】：

【参考方案1】：

查看 Python 文档的日期：

https://docs.python.org/3.8/library/datetime.html

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