restored crossfilter example

Author: Danyel Fisher

spec/6_10_crossfilter.vl.json

@@ -0,0 +1,69 @@
+{
+  "$schema": "https://vega.github.io/schema/vega-lite/v2.json", 
+  "config":{"background":"#ffffff"},
+  "data": {"url": "data/europe_world_bank.csv"},
+  "hconcat": [
+    {
+      "repeat": {
+        "column": ["Population_ages_15_64_of_total", "Population_ages_65_and_above_of_total"]
+      },
+      "spec": {
+        "mark": "bar",
+        "height": 700,
+        "selection": {
+          "brush": {
+            "type": "interval",
+            "encodings": ["y"],
+            "resolve": "intersect"
+          }
+        },
+        "encoding": {
+          "y": {
+            "field": "Country",
+            "type": "ordinal",
+            "sort": {
+              "op": "min",
+              "field": { "repeat":"column"},
+              "order": "descending"
+            }
+          },
+          "x": {
+            "field": { "repeat": "column"},
+            "type": "quantitative"
+          },
+          "color": {
+            "condition": {"selection": {"not": "brush"}, "value": "steelblue"},
+            "value": "goldenrod"
+          }
+        }
+      }
+    },
+    {
+      "mark": "point",
+      "width": 260,
+      "height": 260,
+      "selection": {
+        "brush": {
+          "type": "interval",
+          "resolve": "intersect"
+        }
+        },
+      "encoding": {
+        "y": {
+          "field": "Population_ages_15_64_of_total",
+          "type": "quantitative",
+          "scale": {"zero": false}
+        },
+        "x": {
+          "field": "Population_ages_65_and_above_of_total",
+          "type": "quantitative",
+          "scale": {"zero": false}
+        },
+        "color": {
+          "condition": {"selection": {"not": "brush"}, "value": "steelblue"},
+          "value": "goldenrod"
+        }
+      }
+    }
+  ]
+}