From b70247dcb4ad8aaf3a071a95084442441a076059 Mon Sep 17 00:00:00 2001
From: Robert Konigsberg <konigsberg@google.com>
Date: Sat, 29 Jan 2011 12:14:45 -0500
Subject: [PATCH] Zooming in log scale has been fixed, toDataCoordY was
 basically broken.

---
 dygraph.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dygraph.js b/dygraph.js
index 3196163..9055ad8 100644
--- a/dygraph.js
+++ b/dygraph.js
@@ -441,7 +441,8 @@ Dygraph.prototype.toDataYCoord = function(y, axis) {
   var area = this.plotter_.area;
   var yRange = this.yAxisRange(axis);
 
-  if (!axis.logscale) {
+  if (typeof(axis) == "undefined") axis = 0;
+  if (!this.axes_[axis].logscale) {
     return yRange[0] + (area.h - y) / area.h * (yRange[1] - yRange[0]);
   } else {
     // Computing the inverse of toDomCoord.
-- 
2.7.4