title: Bar chart in pandas on time series data
body: <p>I am trying to do bar chart in pandas on time series data.</p>
  
  <p>Documentation says it is not possible: <a href="http://pandas.pydata.org/pandas-docs/stable/visualization.html#bar-plots" rel="nofollow">http://pandas.pydata.org/pandas-docs/stable/visualization.html#bar-plots</a></p>
  
  <p>Is there some workaround ?</p>
  
  <p>This is my code </p>
  
  <pre><code># there must be ORDER BY, other wise rows will not be ordered
  df = sql.read_frame("SELECT * FROM hzmo_report ORDER BY datum;", cnx, index_col='datum') 
  
  df.index = pd.to_datetime(df.index) # converting to DatetimeIndex 
  
  df['korisnika'].plot(ax=axs1[0], title='SOMETHING', marker='o')
  df['korisnika'].diff().plot(ax=axs1[1], title='SOMETHING', marker='o') # i would like this to be bar plot 
  </code></pre>
  
  <p>If I do </p>
  
  <pre><code>df['korisnika'].diff().plot(kind='bar', ax=axs1[1], title='SOMETHING', marker='o')
  </code></pre>
  
  <p>I have just added kind='bar'</p>
  
  <p>I get:</p>
  
  <pre><code>---------------------------------------------------------------------------
  AttributeError                            Traceback (most recent call last)
  &lt;ipython-input-109-d41eb2b2e3a7&gt; in &lt;module&gt;()
       36 fig1.suptitle('Umirovljenici', fontsize=16)
       37 df['korisnika'].plot(ax=axs1[0], title='Broj korisnika mirovine', marker='o')
  ---&gt; 38 ( df['korisnika'].diff() ).plot(ax=axs1[1], kind='bar', title='Apsolutna razlika naspram prethodnog mjeseca', marker='o')
       39 #df['korisnika'].diff().hist()
       40 
  
  C:\Documents and Settings\hr1ub098\Application Data\Python\Python27\site-packages\pandas\tools\plotting.pyc in plot_series(series, label, kind, use_index, rot, xticks, yticks, xlim, ylim, ax, style, grid, legend, logy, secondary_y, **kwds)
     1504                      secondary_y=secondary_y, **kwds)
     1505 
  -&gt; 1506     plot_obj.generate()
     1507     plot_obj.draw()
     1508 
  
  C:\Documents and Settings\hr1ub098\Application Data\Python\Python27\site-packages\pandas\tools\plotting.pyc in generate(self)
      731         self._compute_plot_data()
      732         self._setup_subplots()
  --&gt; 733         self._make_plot()
      734         self._post_plot_logic()
      735         self._adorn_subplots()
  
  C:\Documents and Settings\hr1ub098\Application Data\Python\Python27\site-packages\pandas\tools\plotting.pyc in _make_plot(self)
     1291             else:
     1292                 rect = bar_f(ax, self.ax_pos + i * 0.75 / K, y, 0.75 / K,
  -&gt; 1293                              start=pos_prior, label=label, **kwds)
     1294             rects.append(rect)
     1295             labels.append(label)
  
  C:\Documents and Settings\hr1ub098\Application Data\Python\Python27\site-packages\pandas\tools\plotting.pyc in f(ax, x, y, w, start, **kwds)
     1251         if self.kind == 'bar':
     1252             def f(ax, x, y, w, start=None, **kwds):
  -&gt; 1253                 return ax.bar(x, y, w, bottom=start, **kwds)
     1254         elif self.kind == 'barh':
     1255             def f(ax, x, y, w, start=None, **kwds):
  
  C:\Documents and Settings\hr1ub098\Application Data\Python\Python27\site-packages\matplotlib\axes.pyc in bar(self, left, height, width, bottom, **kwargs)
     4779                 label='_nolegend_'
     4780                 )
  -&gt; 4781             r.update(kwargs)
     4782             r.get_path()._interpolation_steps = 100
     4783             #print r.get_label(), label, 'label' in kwargs
  
  C:\Documents and Settings\hr1ub098\Application Data\Python\Python27\site-packages\matplotlib\artist.pyc in update(self, props)
      657             func = getattr(self, 'set_'+k, None)
      658             if func is None or not callable(func):
  --&gt; 659                 raise AttributeError('Unknown property %s'%k)
      660             func(v)
      661             changed = True
  
  AttributeError: Unknown property marker
  </code></pre>