matplotlib: Creating two (stacked) subplots with SHARED X axis but SEPARATE Y axis values

Question

I am using matplotlib 1.2.x and Python 2.6.5 on Ubuntu 10.0.4. I am trying to create a SINGLE plot that consists of a top plot and a bottom plot.

The X axis is the date

Answer 1

You should change this line:

ax = fig.add_subplot(111)

to

ax = fig.add_subplot(211)

The original command means that there is one row and one column so it occupies the whole graph. So your second graph fig.add_subplot(212) cover the lower part of the first graph.

Edit

If you dont want the gap between two plots, use subplots_adjust() to change the size of the subplots margin.