Fix bug 436. Only restore axes that remain after an option update.

[dygraphs.git] / dygraph.js

diff --git a/dygraph.js b/dygraph.js
index f198cff..9a5be72 100644 (file)
--- a/dygraph.js
+++ b/dygraph.js
@@ -2472,7 +2472,12 @@ Dygraph.prototype.computeYAxes_ = function() {
 
   if (valueWindows !== undefined) {
     // Restore valueWindow settings.
-    for (index = 0; index < valueWindows.length; index++) {
+
+    // When going from two axes back to one, we only restore
+    // one axis.
+    var idxCount = Math.min(valueWindows.length, this.axes_.length);
+
+    for (index = 0; index < idxCount; index++) {
       this.axes_[index].valueWindow = valueWindows[index];
     }
   }