Fix IndexError in `svg.charts.plot.Plot.field_size` when there are only two values returned by float_range (in the case there are only two different 'y' values in the data) and scale_y_integers == True. Credit to Jean Schurger <http://schurger.org/>_ for the patch.

readme.txt

@@ -50,6 +50,17 @@ More To-Dos
 Changes
 -------
 
+2.0.3
+~~~~~
+
+* Fix IndexError in ``svg.charts.plot.Plot.field_size`` when there are
+  only two values returned by float_range (in the case there are only
+  two different 'y' values in the data) and scale_y_integers == True.
+  Credit to `Jean Schurger <http://schurger.org/>`_ for the patch.
+* Fixed problem in setup.py installing on Unix OS (case sensitivity of 
+  readme.txt). Credit to Luke Miller and Jean Schurger for supplying
+  a patch for this issue.
+
 2.0.2
 ~~~~~
 

svg/charts/plot.py

@@ -215,7 +215,8 @@ class Plot(Graph):
 		side = {'x': 'right', 'y': 'top'}[axis]
 		values = getattr(self, 'get_%s_values' % axis)()
 		max_d = self.data_max(axis)
-		dx = float(max_d - values[-1]) / (values[-1] - values[-2])
+		dx = len(values) > 1 and float(max_d - values[-1]) / \
+			(values[-1] - values[-2]) or max_d
 		graph_size = getattr(self, 'graph_%s' % size)
 		side_font = getattr(self, '%s_font' % side)
 		side_align = getattr(self, '%s_align' % side)