From 5282c63ec3e4f288f3837983df0a772c786c3023 Mon Sep 17 00:00:00 2001
From: msrocka <michael.srocka@gmail.com>
Date: Mon, 25 Aug 2014 13:29:22 +0200
Subject: [PATCH] fix #570: getDecimalPlaces throws error

---
 src/Chart.Core.js | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/Chart.Core.js b/src/Chart.Core.js
index 03b99b45a..32fcdeee4 100755
--- a/src/Chart.Core.js
+++ b/src/Chart.Core.js
@@ -306,7 +306,20 @@
 		},
 		getDecimalPlaces = helpers.getDecimalPlaces = function(num){
 			if (num%1!==0 && isNumber(num)){
-				return num.toString().split(".")[1].length;
+				var s = num.toString();
+				if(s.indexOf("e-") < 0){
+					// no exponent, e.g. 0.01
+					return s.split(".")[1].length;
+				}
+				else if(s.indexOf(".") < 0) {
+					// no decimal point, e.g. 1e-9
+					return parseInt(s.split("e-")[1]);
+				}
+				else {
+					// exponent and decimal point, e.g. 1.23e-9
+					var parts = s.split(".")[1].split("e-");
+					return parts[0].length + parseInt(parts[1]);
+				}
 			}
 			else {
 				return 0;