From 41333ec0050007092282f3884b7ec6a2edffa853 Mon Sep 17 00:00:00 2001
From: Dan Vanderkam <danvdk@gmail.com>
Date: Mon, 13 Sep 2010 17:34:39 -0700
Subject: [PATCH] more robust missing values

---
 dygraph.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dygraph.js b/dygraph.js
index ba266ab..37a9c30 100644
--- a/dygraph.js
+++ b/dygraph.js
@@ -1900,8 +1900,8 @@ Dygraph.prototype.parseCSV_ = function(data) {
 
   // Parse the x as a float or return null if it's not a number.
   var parseFloatOrNull = function(x) {
-    if (x.length == 0) return null;
-    return parseFloat(x);
+    var val = parseFloat(x);
+    return isNaN(val) ? null : val;
   };
 
   var xParser;
-- 
2.7.4