Plot different DataFrames in the same figure
If you a running Jupyter/Ipython notebook and having problems using;
ax = df1.plot()
df2.plot(ax=ax)
Run the command inside of the same cell!! It wont, for some reason, work when they are separated into sequential cells. For me at least.
Although Chang's answer explains how to plot multiple times on the same figure, in this case you might be better off in this case using a groupby and unstacking:
(Assuming you have this in dataframe, with datetime index already)
In [1]: dfOut[1]: value datetime 2010-01-01 1 2010-02-01 1 2009-01-01 1 # create additional month and year columns for conveniencedf['Month'] = map(lambda x: x.month, df.index)df['Year'] = map(lambda x: x.year, df.index) In [5]: df.groupby(['Month','Year']).mean().unstack()Out[5]: value Year 2009 2010Month 1 1 12 NaN 1Now it's easy to plot (each year as a separate line):
df.groupby(['Month','Year']).mean().unstack().plot()