bugfix for .x() and .y() - see gist / http://bl.ocks.org/3192376 - clone that one, replace the

<script src="./nvd3/src/models/lineWithFocusChart.js"></script>
in there which points at a clone of this commit to the nvd3 code repo without this fix and see the NaN's flying thick.

src/models/lineWithFocusChart.js

@@ -99,14 +99,18 @@ nv.models.lineWithFocusChart = function() {
         .height(availableHeight)
         .color(data.map(function(d,i) {
           return d.color || color[i % color.length];
-        }).filter(function(d,i) { return !data[i].disabled }));
+        }).filter(function(d,i) {
+          return !data[i].disabled;
+        }));
 
       lines2
         .width(availableWidth)
         .height(availableHeight2)
         .color(data.map(function(d,i) {
           return d.color || color[i % color.length];
-        }).filter(function(d,i) { return !data[i].disabled }));
+        }).filter(function(d,i) {
+          return !data[i].disabled;
+        }));
 
 
       g.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');
@@ -285,7 +289,25 @@ nv.models.lineWithFocusChart = function() {
   chart.xAxis = xAxis;
   chart.yAxis = yAxis;
 
-  d3.rebind(chart, lines, 'x', 'y', 'size', 'xDomain', 'yDomain', 'forceX', 'forceY', 'interactive', 'clipEdge', 'clipVoronoi', 'id');
+  d3.rebind(chart, lines, 'size', 'xDomain', 'yDomain', 'forceX', 'forceY', 'interactive', 'clipEdge', 'clipVoronoi', 'id');
+
+  chart.x = function(_) {
+    if (!arguments.length) return lines.x;
+    lines.x(_);
+    lines2.x(_);
+    return chart;
+  };
+
+  chart.y = function(_) {
+    if (!arguments.length) return lines.y;
+    lines.y(_);
+    lines2.y(_);
+    return chart;
+  };
+
+  // TODO: do the other d3.rebind() items for lines->chart like .x() and .y() above:
+  //       if you don't, then the bottom section (lines2) won't see the user changes
+  //       going through these calls.
 
 
   chart.margin = function(_) {