Fixed max and min calculations for multibar stacked

nv.d3.js

@@ -5359,10 +5359,10 @@ nv.models.multiBar = function() {
       x   .domain(d3.merge(seriesData).map(function(d) { return d.x }))
           .rangeBands([0, availableWidth], .1);
 
-      y   .domain(yDomain || d3.extent(d3.merge(seriesData).map(function(d) { return d.y + (stacked ? d.y1 : 0) }).concat(forceY)))
+      //y   .domain(yDomain || d3.extent(d3.merge(seriesData).map(function(d) { return d.y + (stacked ? d.y1 : 0) }).concat(forceY)))
+      y   .domain(yDomain || d3.extent(d3.merge(seriesData).map(function(d) { return stacked ? (d.y > 0 ? d.y1 : d.y1 + d.y ) : d.y }).concat(forceY)))
           .range([availableHeight, 0]);
 
-
       // If scale's domain don't have a range, slightly adjust to make one... so a chart can show a single data point
       if (x.domain()[0] === x.domain()[1] || y.domain()[0] === y.domain()[1]) singlePoint = true;
       if (x.domain()[0] === x.domain()[1])

src/models/multiBar.js

@@ -95,10 +95,10 @@ nv.models.multiBar = function() {
       x   .domain(d3.merge(seriesData).map(function(d) { return d.x }))
           .rangeBands([0, availableWidth], .1);
 
-      y   .domain(yDomain || d3.extent(d3.merge(seriesData).map(function(d) { return d.y + (stacked ? d.y1 : 0) }).concat(forceY)))
+      //y   .domain(yDomain || d3.extent(d3.merge(seriesData).map(function(d) { return d.y + (stacked ? d.y1 : 0) }).concat(forceY)))
+      y   .domain(yDomain || d3.extent(d3.merge(seriesData).map(function(d) { return stacked ? (d.y > 0 ? d.y1 : d.y1 + d.y ) : d.y }).concat(forceY)))
           .range([availableHeight, 0]);
 
-
       // If scale's domain don't have a range, slightly adjust to make one... so a chart can show a single data point
       if (x.domain()[0] === x.domain()[1] || y.domain()[0] === y.domain()[1]) singlePoint = true;
       if (x.domain()[0] === x.domain()[1])