diff --git a/src/coord/cartesian/Cartesian2D.js b/src/coord/cartesian/Cartesian2D.js
index b3a9010a3379d080bbc75615693f8f6b7326aeec..42b94b3121e503cb73c81f9ea6a50c8c6dc041a9 100644
--- a/src/coord/cartesian/Cartesian2D.js
+++ b/src/coord/cartesian/Cartesian2D.js
@@ -34,7 +34,7 @@ define(function(require) {
             var categoryAxis = this.getAxesByScale('ordinal')[0];
             var swapAxis = categoryAxis && categoryAxis.dim === 'y';
             var x = dataItem.getX();
-            var y = dataItem.getY();
+            var y = categoryAxis ? dataItem.getValue() : dataItem.getY();
 
             var coord = [];
             coord[xIndex] = xAxis.dataToCoord(swapAxis ? y : x);
diff --git a/src/coord/cartesian/Grid.js b/src/coord/cartesian/Grid.js
index 7681a34dccee061b30681b563403218c557825f9..624e1e43a8fa0e420af86199e85171650dfdad47 100644
--- a/src/coord/cartesian/Grid.js
+++ b/src/coord/cartesian/Grid.js
@@ -254,7 +254,7 @@ define(function(require, factory) {
                             });
                         }
                         else {
-                            data.eachY(function (value) {
+                            data.eachValue(function (value) {
                                 axisData[categoryAxis.dim == 'y' ? 'x' : 'y'].push(value);
                             });
                         }
diff --git a/src/data/List.js b/src/data/List.js
index e99faaa535480bc414e75ae5f020d374d6a10abc..8cfd6a20d2258bc0e46e9a4f2a630456f1f31acd 100644
--- a/src/data/List.js
+++ b/src/data/List.js
@@ -86,10 +86,6 @@ define(function(require) {
             if (this.dimension > 1) {
                 return this._value[1];
             }
-            else {
-                // Value is a single number if data is 1d
-                return this._value;
-            }
         },
 
         /**
@@ -99,9 +95,6 @@ define(function(require) {
             if (this.dimension > 1) {
                 this._value[1] = y;
             }
-            else {
-                this._value = y;
-            }
         },
 
         /**
@@ -126,6 +119,11 @@ define(function(require) {
          * @return {number}
          */
         getValue: function () {
+            // PENDING
+            // Value is a single number if data is 1d
+            if (this.dimension === 1) {
+                return this._value;
+            }
             return this._value[this.dimension];
         },
 
@@ -133,7 +131,12 @@ define(function(require) {
          * @param {number} value
          */
         setValue: function (value) {
-            this._value[this.dimension] = value
+            if (this.dimension === 1) {
+                this._value = value;
+            }
+            else {
+                this._value[this.dimension] = value
+            }
         },
 
         clone: function () {