---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-28-bb7fe1da6cc2> in <module>()
----> 1 ev.plot()
/usr/lib/python2.7/dist-packages/pandas/tools/plotting.pyc in plot_frame(frame, x, y, subplots, sharex, sharey, use_index, figsize, grid, legend, rot, ax, style, title, xlim, ylim, logx, logy, xticks, yticks, kind, sort_columns, fontsize, secondary_y, **kwds)
1733 secondary_y=secondary_y, **kwds)
1734
-> 1735 plot_obj.generate()
1736 plot_obj.draw()
1737 if subplots:
/usr/lib/python2.7/dist-packages/pandas/tools/plotting.pyc in generate(self)
901 def generate(self):
902 self._args_adjust()
--> 903 self._compute_plot_data()
904 self._setup_subplots()
905 self._make_plot()
/usr/lib/python2.7/dist-packages/pandas/tools/plotting.pyc in _compute_plot_data(self)
982 if is_empty:
983 raise TypeError('Empty {0!r}: no numeric data to '
--> 984 'plot'.format(numeric_data.__class__.__name__))
985
986 self.data = numeric_data
TypeError: Empty 'DataFrame': no numeric data to plot