/* ------------------------------------------------------------------------------ * * # 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: " + "" + formatCount(d.y) + ""; }) // 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); } } });