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+/* ------------------------------------------------------------------------------
+ *
+ *  # D3.js - histogram chart
+ *
+ *  Demo d3.js histogram chart setup with tooltip and random data
+ *
+ *  Version: 1.0
+ *  Latest update: August 1, 2015
+ *
+ * ---------------------------------------------------------------------------- */
+
+$(function () {
+
+    // Initialize chart
+    stackedMultiples('#d3-histogram', 400);
+
+    // Chart setup
+    function stackedMultiples(element, height) {
+
+
+        // Basic setup
+        // ------------------------------
+
+        // Define main variables
+        var d3Container = d3.select(element),
+            margin = {top: 15, right: 20, bottom: 20, left: 60},
+            width = d3Container.node().getBoundingClientRect().width - margin.left - margin.right,
+            height = height - margin.top - margin.bottom - 5;
+
+        // Generate a Bates distribution of 10 random variables.
+        var values = d3.range(1000).map(d3.random.bates(4));
+
+        // Data format
+        var formatCount = d3.format(",.0f");
+
+
+
+        // Construct scales
+        // ------------------------------
+
+        // Horizontal
+        var x = d3.scale.linear()
+            .domain([0, 1])
+            .range([0, width]);
+
+        // Generate a histogram using twenty uniformly-spaced bins.
+        var data = d3.layout.histogram()
+            .bins(x.ticks(20))
+            (values);
+
+        // Vertical
+        var y = d3.scale.linear()
+            .domain([0, d3.max(data, function(d) { return d.y; })])
+            .range([height, 0]);
+
+        // Colors
+        var color = d3.scale.ordinal().range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]);
+
+
+
+        // Create axes
+        // ------------------------------
+
+        // Horizontal
+        var xAxis = d3.svg.axis()
+            .scale(x)
+            .orient("bottom");
+
+
+
+        // Create chart
+        // ------------------------------
+
+        // Add SVG element
+        var container = d3Container.append("svg");
+
+        // Add SVG group
+        var svg = container
+            .attr("width", width + margin.left + margin.right)
+            .attr("height", height + margin.top + margin.bottom)
+            .append("g")
+                .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
+
+
+
+        // Add tooltip
+        // ------------------------------
+
+        // Create tooltip
+        var tip = d3.tip()
+            .attr('class', 'd3-tip')
+            .offset([-25, 0])
+            .html(function(d) {
+                return "Current value: " + "<span class='text-semibold'>" + formatCount(d.y) + "</span>";
+            })
+
+        // Initialize tooltip
+        svg.call(tip);
+
+
+        //
+        // Append chart elements
+        //
+
+        // Add bars
+        // ------------------------------
+
+        // Group each bar
+        var bar = svg.selectAll(".d3-bar")
+            .data(data)
+            .enter()
+            .append("g")
+                .attr("class", "d3-bar")
+                .attr("transform", function(d) { return "translate(" + x(d.x) + "," + y(d.y) + ")"; })
+                .on('mouseover', tip.show)
+                .on('mouseout', tip.hide);
+
+        // Append bars
+        bar.append("rect")
+            .attr("x", 1)
+            .attr("width", x(data[0].dx) - 3)
+            .attr("height", function(d) { return height - y(d.y); })
+            .style("fill", function(d) { return color(d); });
+
+        // Append text
+        bar.append("text")
+            .attr("dy", ".75em")
+            .attr("y", -15)
+            .attr("x", x(data[0].dx) / 2)
+            .style("text-anchor", "middle")
+            .style("fill", "#333")
+            .text(function(d) { return formatCount(d.y); });
+
+        // Append axes
+        // ------------------------------
+
+        // Horizontal
+        svg.append("g")
+            .attr("class", "d3-axis d3-axis-horizontal d3-axis-strong")
+            .attr("transform", "translate(0," + height + ")")
+            .call(xAxis);
+
+
+
+        // Resize chart
+        // ------------------------------
+
+        // Call function on window resize
+        $(window).on('resize', resize);
+
+        // Call function on sidebar width change
+        $('.sidebar-control').on('click', resize);
+
+        // Resize function
+        // 
+        // Since D3 doesn't support SVG resize by default,
+        // we need to manually specify parts of the graph that need to 
+        // be updated on window resize
+        function resize() {
+
+            // Layout variables
+            width = d3Container.node().getBoundingClientRect().width - margin.left - margin.right;
+
+
+            // Layout
+            // -------------------------
+
+            // Main svg width
+            container.attr("width", width + margin.left + margin.right);
+
+            // Width of appended group
+            svg.attr("width", width + margin.left + margin.right);
+
+
+            // Axes
+            // -------------------------
+
+            // Horizontal range
+            x.range([0, width]);
+
+            // Horizontal axis
+            svg.selectAll('.d3-axis-horizontal').call(xAxis);
+
+
+            // Chart elements
+            // -------------------------
+
+            // Bar group
+            svg.selectAll('.d3-bar').attr("transform", function(d) { return "translate(" + x(d.x) + "," + y(d.y) + ")"; });
+
+            // Bar rect
+            svg.selectAll('.d3-bar rect').attr("x", 1).attr("width", x(data[0].dx) - 3);
+
+            // Bar text
+            svg.selectAll('.d3-bar text').attr("x", x(data[0].dx) / 2);
+        }
+    }
+});