问题
What I've tried for a sort "should" be working; but it is not.
I've queried the "Alpha Vantage" API using the "alpha_vantage" Python library. Below is my code. I am requesting to sort by date; but, as you can see from the output in the df.head() the sorting by date is in the wrong direction. However, the plot is going in the right direction.
df, meta_data = ts.get_daily(symbol='AAPL',outputsize=365)
df['4. close'].plot()
plt.title('Intraday Times Series for the AAPL stock (5 min)')
# Attempting sort here! Also I've tried df.sort_values(by=['date'])
df.sort_values(by=['date'])
print(plt.show())
print(df.head())
Output:
None
date 1. open 2. high 3. low 4. close 5. volume
2019-11-13 261.13 262.95 261.07 262.4307 3284781.0
2019-11-12 261.55 262.79 260.92 261.9600 21826100.0
2019-11-11 258.30 262.47 258.28 262.2000 20455300.0
2019-11-08 258.69 260.44 256.85 260.1400 17496600.0
2019-11-07 258.74 260.35 258.11 259.4300 23735100.0
回答1:
df = df.sort_values(by=['date'])
should get it done
来源：https://stackoverflow.com/questions/58840655/python-and-pandas-sorting-by-date