Include labels with value >= 0

Author: destiny-wu

draftlogs/6051_fix.md

@@ -0,0 +1 @@
+- Discard negative values from pie chart post-aggregation instead of during summation [[#6051](https://github.com/plotly/plotly.js/pull/6051)]

src/traces/pie/calc.js

@@ -76,7 +76,7 @@ function calc(gd, trace) {
     }
 
     // Drop aggregate sums of value 0 or less
-    cd = cd.filter(function(elem) { return elem.v > 0; });
+    cd = cd.filter(function(elem) { return elem.v >= 0; });
 
     var shouldSort = (trace.type === 'funnelarea') ? isAggregated : trace.sort;
     if(shouldSort) cd.sort(function(a, b) { return b.v - a.v; });

test/image/baselines/pie_negative_values.png

@@ -38,5 +38,4 @@
       "height": 300,
       "width": 500
     }
-  }
-  
+}