making matplotlib scatter plots from dataframes in Python's pandas

Question

What is the best way to make a series of scatter plots using matplotlib from a pandas dataframe in Python?

For example, if I have a datafr

Answer 1

There is little to be added to Garrett's great answer, but pandas also has a scatter method. Using that, it's as easy as

df = pd.DataFrame(np.random.randn(10,2), columns=['col1','col2'])
df['col3'] = np.arange(len(df))**2 * 100 + 100
df.plot.scatter('col1', 'col2', df['col3'])