From: Michaël Arnauts <michael.arnauts@gmail.com>
Date: Sat, 9 Jan 2016 11:04:29 +0000 (+0100)
Subject: Ignore null values when calculating scale
X-Git-Tag: v1.1.0~19^2
X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=refs%2Fpull%2F1875%2Fhead;p=thirdparty%2FChart.js.git

Ignore null values when calculating scale
---

diff --git a/src/Chart.Core.js b/src/Chart.Core.js
index 16f9d50d1..3a21f0abd 100755
--- a/src/Chart.Core.js
+++ b/src/Chart.Core.js
@@ -409,8 +409,13 @@
 				maxSteps = Math.floor(drawingSize/(textSize * 1.5)),
 				skipFitting = (minSteps >= maxSteps);
 
-			var maxValue = max(valuesArray),
-				minValue = min(valuesArray);
+			// Filter out null values since these would min() to zero
+			var values = [];
+			each(valuesArray, function( v ){
+				v == null || values.push( v );
+			});
+			var minValue = min(values),
+			    maxValue = max(values);
 
 			// We need some degree of separation here to calculate the scales if all the values are the same
 			// Adding/minusing 0.5 will give us a range of 1.