Add pie/donut charts to examples, ipynb, readme, and docs

Author: wrobstory

README.md

@@ -142,6 +142,23 @@ group.colors(brew='Set2')
 ```
 ![groupbar2](http://farm6.staticflickr.com/5518/9391272912_706055754a_o.jpg)
 
+Pie charts:
+
+```python
+vis = vincent.Pie(farm_1)
+vis.legend('Farm 1 Fruit')
+```
+![pie](http://farm4.staticflickr.com/3684/11391908745_2837f1bb9a.jpg)
+
+Donut charts:
+
+```
+vis = vincent.Pie(farm_1, inner_radius=200)
+vis.colors(brew="Set2")
+vis.legend('Farm 1 Fruit')
+```
+![donut](http://farm6.staticflickr.com/5530/11391917226_598fbdf3e2.jpg)
+
 Simple maps can be built quickly (all data can be found in the [vincent_map_data](https://github.com/wrobstory/vincent_map_data) repo):
 
 ```python
@@ -334,13 +351,13 @@ Huge thanks to all who have contributed to Vincent development:
  * Rob Story (wrobstory)
  * Dan Miller (dnmiller)
  * Peter Lubell-Doughtie (pld)
+ * Lx Yu (lxyu)
  * Damien Garaud (garaud)
  * Abraham Flaxman (aflaxman)
  * Mahdi Yusuf (myusuf3)
  * Richard Maisano (maisano)
  * Julian Berman (Julian)
  * Chris Rebert (cvrebert)
- * Lx Yu (lxyu)
  * Wojciech Bederski (wuub)
  * Min RK (minrk)
  * Drazen Lucanin (kermit666)

doc/build/doctrees/charts_library.doctree

@@ -1,4 +1,4 @@
 # Sphinx build info version 1
 # This file hashes the configuration used when building these files. When it is not found, a full rebuild will be done.
-config: 1825ee24304a60009a54edfcf4b4193b
-tags: 645f666f9bcd5a90fca523b33c5a78b7
+config: 31ac93b6d6a45684f9fd7ee3765dc6bc
+tags: a205e9ed8462ae86fdd2f73488852ba9

doc/build/doctrees/environment.pickle

@@ -82,7 +82,7 @@ Multiple lines can also be plotted easily::
     multi_iter1 = {'index': index}
     for cat in cats:
         multi_iter1[cat] = [random.randint(10, 100) for x in index]
-    lines = vincent.Line(data, iter_idx='index')
+    lines = vincent.Line(multi_iter1, iter_idx='index')
     lines.legend(title='Categories')
     lines.axis_titles(x='Index', y='Data Value')
 
@@ -197,6 +197,26 @@ Currently grouped sets only work with Pandas DataFrames, but that should change
 
 .. image:: /images/grouped_bar2.png
 
+.. _chart_lib_pie:
+
+Pie/Donut Chart
+---------------
+
+Pie chart outer radius defaults to 1/2 min(width/height)::
+
+    pie = vincent.Pie(farm_1)
+    pie.legend('Farm 1 Fruit')
+
+.. image:: /images/pie_0.png
+
+Donut charts can be created by passing an inner radius::
+
+    donut = vincent.Pie(farm_1, inner_radius=500)
+    donut.colors(brew="Set2")
+    donut.legend('Farm 1 Fruit')
+
+.. image:: /images/donut_0.png
+
 .. _chart_lib_simple_map:
 
 Simple Map

doc/build/doctrees/quickstart.doctree

@@ -29,6 +29,21 @@ Labeling the axes is simple::
 
 .. image:: /images/quick_bar2.png
 
+You can also control aspects of the layout::
+
+    import vincent
+    from vincent import AxisProperties, PropertySet, ValueRef 
+    bar = vincent.Bar(multi_iter1['y1'])
+    bar.axis_titles(x='Index', y='Value')
+    #rotate x axis labels
+    ax = AxisProperties(
+             labels = PropertySet(angle=ValueRef(value=90)))
+    bar.axes[0].properties = ax
+	
+.. image:: /images/quick_bar3.png
+
+
+
 .. _quick_line:
 
 Line

doc/build/doctrees/vega_api.doctree

@@ -93,6 +93,7 @@
 <li class="toctree-l2"><a class="reference internal" href="charts_library.html#stacked-area">Stacked Area</a></li>
 <li class="toctree-l2"><a class="reference internal" href="charts_library.html#stacked-bar">Stacked Bar</a></li>
 <li class="toctree-l2"><a class="reference internal" href="charts_library.html#grouped-bar">Grouped Bar</a></li>
+<li class="toctree-l2"><a class="reference internal" href="charts_library.html#pie-donut-chart">Pie/Donut Chart</a></li>
 <li class="toctree-l2"><a class="reference internal" href="charts_library.html#simple-map">Simple Map</a></li>
 <li class="toctree-l2"><a class="reference internal" href="charts_library.html#map-data-binding">Map Data Binding</a></li>
 </ul>
@@ -406,7 +407,7 @@ <h2>Data Importing<a class="headerlink" href="#data-importing" title="Permalink
     </p>
     <p>
         &copy; Copyright 2013, Rob Story, Dan Miller, et. al..<br/>
-      Created using <a href="http://sphinx.pocoo.org/">Sphinx</a> 1.2b2.<br/>
+      Created using <a href="http://sphinx.pocoo.org/">Sphinx</a> 1.2b1.<br/>
     </p>
   </div>
 </footer>