diff -r efd9c589177a -r c0b4a8b5a012 toolkit/javascript/d3/src/core/range.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/src/core/range.js	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,21 @@
+/**
+ * @param {number} start
+ * @param {number=} stop
+ * @param {number=} step
+ */
+d3.range = function(start, stop, step) {
+  if (arguments.length < 3) {
+    step = 1;
+    if (arguments.length < 2) {
+      stop = start;
+      start = 0;
+    }
+  }
+  if ((stop - start) / step == Infinity) throw new Error("infinite range");
+  var range = [],
+       i = -1,
+       j;
+  if (step < 0) while ((j = start + step * ++i) > stop) range.push(j);
+  else while ((j = start + step * ++i) < stop) range.push(j);
+  return range;
+};