Bar graph added.

node_modules/vega-util/src/inrange.js

@@ -0,0 +1,18 @@
+/**
+ * Predicate that returns true if the value lies within the span
+ * of the given range. The left and right flags control the use
+ * of inclusive (true) or exclusive (false) comparisons.
+ */
+export default function(value, range, left, right) {
+  var r0 = range[0], r1 = range[range.length-1], t;
+  if (r0 > r1) {
+    t = r0;
+    r0 = r1;
+    r1 = t;
+  }
+  left = left === undefined || left;
+  right = right === undefined || right;
+
+  return (left ? r0 <= value : r0 < value) &&
+    (right ? value <= r1 : value < r1);
+}