pandas matplotlib example

Here's an example of using pandas and matplotlib to plot a line graph:

import pandas as pd
import matplotlib.pyplot as plt

# create a dataframe with some sample data
data = {'year': [2010, 2011, 2012, 2013, 2014, 2015, 2016],
        'sales': [100, 120, 140, 160, 180, 200, 220]}
df = pd.DataFrame(data)

# plot the data as a line graph
plt.plot(df['year'], df['sales'])

# add labels and title
plt.xlabel('Year')
plt.ylabel('Sales')
plt.title('Sales over Time')

# display the plot
plt.show()

This will create a line graph of sales over time, with the year on the x-axis and the sales on the y-axis. The plot will have labels and a title, and will be displayed using matplotlib.