title: Bokeh : use of rectangles glyph, width and x sharing
body: <p>I am using Bokeh (1.4.0) in python for interactive plotting. I am using a rectangle plot as an anomaly alerting feedback on data. Unfortunately there are enormous white gaps between the rectangles. The width parameter does not change anything. This is probably due to the x_sharing parameter with the first plot I above.</p>
  <pre><code>plot_options = dict(plot_width=width, plot_height=300, x_axis_type=&quot;datetime&quot;,
                              x_range=p1.x_range)
  p4 = figure(title=&quot;Analyse d'anomalie&quot;, tools=&quot;reset, pan, box_select, wheel_zoom&quot;, y_range=tuple(anomaly_names), **plot_options)
          for j,name in list(zip(range(len(anomaly_names)), anomaly_names)):
              p4.rect(x=&quot;estampilles&quot;, y=heatmap_y_coordinate[j], width=1000, height=1, line_color=None,
              line_alpha=0, fill_color=transform(name, mapper), dilate=True, source=source_dic)
  </code></pre>
  <p>Here <code>source_dic</code> is a dictionary.</p>
  <p><a href="https://i.stack.imgur.com/lvRRc.png" rel="nofollow noreferrer">The third plot from the top shows narrow rectangles</a></p>
  <p>Has anyone any idea on how to tackle this ? There is nothing written on the documentation about this. I am eager to hear from the community.</p>
  <p>Thanks.</p>
  <p>Yours,</p>
  <p>G.H</p>