matplotlib dataframe x軸日期問題

Question

import sys 
import ConfigParser 
import pandas as pd 
import numpy as np 
import matplotlib.pyplot as plt 
import matplotlib.dates as mdates 
import datetime as DT 
import bokeh 
sys.path.extend(['..\..\myProj\SOURCE']) 

fullfilepath = "../../myProj/SOURCE/" + 'myparts.txt' 
ohg_df = pd.read_csv(fullfilepath, sep="\t") 

temp_df = temp_df[['as_on_date', 'ohg_qty']] 

temp_df = temp_df.sort(['as_on_date'], ascending=[1]) 

temp_df.set_index('as_on_date') 

plt.plot(temp_df.index, temp_df.ohg_qty) 

plt.show() 

這是導入後的數據幀。

我想繪製與數據框中提到的日期x axis線圖。

有人可以指導我...我是熊貓新手。

dataframe picture

output pitcure

Answer 1

更簡單：

# Set index directly 
ohg_df = pd.read_csv(fullfilepath, sep="\t", index='as_on_date') 

# Convert string index to dates 
ohg_df.index = pd.to_datetime(ohg_df.index) 

# Get a column and plot it (taking a column keeps the index) 
plt.plot(ohg_df.ohg_qty)