无法使用Python在图形中绘制日期

Question

I'm trying to plot a graph dates vs. counts. This is my code:

trip_data['start_date'] = sorted(trip_data['start_date'], key=lambda x: datetime.datetime.strptime(x, '%Y-%m-%d'))
data_count = pd.DataFrame(data=trip_data['start_date'].value_counts().sort_index())
data_count.rename(columns={'start_date' : 'count'}, inplace = True)
data_count.reset_index(inplace=True)
data_count.rename(columns={'index' : 'start_date'}, inplace = True)
data_count.plot()

And I get this graph:

So clearly the dates won't plot correctly, they just add up as int. I've tried a number of solutions I've found on Google and here on Stackoverflow, but none seems to work. The majority of them also had stripping dates as the main point, but as the code shows that has already been done. Plotting a hist graph also reverses the x and y axes, if that's useful. Any thoughts? Thank you in advance!

Answer 1

An option you have is to change the x-axis labels. Assuming your plot's current x-axis is using the index of the dataframe, you can use this code:

labels = data_count['start_date'].tolist()
plt.xticks(data_count.index.values, labels, rotation='vertical')