如何绘制日期和月份 [英] How to plot day and month

问题描述

我有一个随时间变化的每日趋势图.

I have a chart of a daily trend over time.

这里的年份无关紧要，我只想显示日期和月份.我知道您可以显示年份和月份，但事实并非如此.

The year is not relevant here and I want to show only day and month. I know you can show year and month but that is not the case.

我试图创建一个名为"Day_Month"的新变量:

I tried to create a new variable called "Day_Month":

import datetime as dt
df['Day'] =  df['date'].dt.day
df['Month'] =  df['date'].dt.month
df['Day_Month'] = df['Day'].astype(str) + "-" + 

但是无法将其绘制为字符串或将其转换为日期类型.

but it's not possible to plot it as a string nor to convert it to date type.

最终，我希望图表如下所示:

eventually, I would like my chart to look like this:

推荐答案

我找到的答案是:

import matplotlib.dates as mdates
import matplotlib.pyplot as plt 

fig = plt.figure()
ax = fig.add_subplot(111)
plt.plot(date, price , label="Price")
ax.xaxis.set_major_formatter(mdates.DateFormatter('%m-%d'))

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