app/assets/javascripts/d3.js in d3_rails-3.5.1 vs app/assets/javascripts/d3.js in d3_rails-3.5.2

@@ -1,8 +1,8 @@
 !function() {
   var d3 = {
-    version: "3.5.1"
+    version: "3.5.2"
   };
   if (!Date.now) Date.now = function() {
     return +new Date();
   };
   var d3_arraySlice = [].slice, d3_array = function(list) {
@@ -131,10 +131,35 @@
     } else {
       while (++i < n) if (d3_numeric(a = d3_number(f.call(array, array[i], i)))) numbers.push(a);
     }
     if (numbers.length) return d3.quantile(numbers.sort(d3_ascending), .5);
   };
+  d3.variance = function(array, f) {
+    var n = array.length, m = 0, a, d, s = 0, i = -1, j = 0;
+    if (arguments.length === 1) {
+      while (++i < n) {
+        if (d3_numeric(a = d3_number(array[i]))) {
+          d = a - m;
+          m += d / ++j;
+          s += d * (a - m);
+        }
+      }
+    } else {
+      while (++i < n) {
+        if (d3_numeric(a = d3_number(f.call(array, array[i], i)))) {
+          d = a - m;
+          m += d / ++j;
+          s += d * (a - m);
+        }
+      }
+    }
+    if (j > 1) return s / (j - 1);
+  };
+  d3.deviation = function() {
+    var v = d3.variance.apply(this, arguments);
+    return v ? Math.sqrt(v) : v;
+  };
   function d3_bisector(compare) {
     return {
       left: function(a, x, lo, hi) {
         if (arguments.length < 3) lo = 0;
         if (arguments.length < 4) hi = a.length;
@@ -8570,10 +8595,10 @@
   d3_transitionPrototype.call = d3_selectionPrototype.call;
   d3_transitionPrototype.empty = d3_selectionPrototype.empty;
   d3_transitionPrototype.node = d3_selectionPrototype.node;
   d3_transitionPrototype.size = d3_selectionPrototype.size;
   d3.transition = function(selection, name) {
-    return arguments.length ? d3_transitionInheritId ? selection.transition(name) : selection : d3_selectionRoot.transition(name);
+    return selection && selection.transition ? d3_transitionInheritId ? selection.transition(name) : selection : d3_selectionRoot.transition(selection);
   };
   d3.transition.prototype = d3_transitionPrototype;
   d3_transitionPrototype.select = function(selector) {
     var id = this.id, ns = this.namespace, subgroups = [], subgroup, subnode, node;
     selector = d3_selection_selector(selector);
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