/* ------------------------------------------------------------------------------ * * # D3.js - stacked area chart * * Demo d3.js stacked area chart setup with .tsv data source * * Version: 1.0 * Latest update: August 1, 2015 * * ---------------------------------------------------------------------------- */ $(function () { // Initialize chart areaStacked('#d3-area-stacked', 400); // Chart setup function areaStacked(element, height) { // Basic setup // ------------------------------ // Define main variables var d3Container = d3.select(element), margin = {top: 5, right: 10, bottom: 20, left: 40}, width = d3Container.node().getBoundingClientRect().width - margin.left - margin.right, height = height - margin.top - margin.bottom - 5; // Format data var parseDate = d3.time.format("%y-%b-%d").parse, formatPercent = d3.format(".0%"); // Colors var color = d3.scale.category20(); // Construct scales // ------------------------------ // Horizontal var x = d3.time.scale() .range([0, width]); // Vertical var y = d3.scale.linear() .range([height, 0]); // Create axes // ------------------------------ // Horizontal var xAxis = d3.svg.axis() .scale(x) .orient("bottom") .ticks(6) .tickFormat(d3.time.format("%b")); // Vertical var yAxis = d3.svg.axis() .scale(y) .orient("left") .tickFormat(formatPercent); // Create chart // ------------------------------ // Add SVG element var container = d3.select(element).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 + ")"); // Construct chart layout // ------------------------------ // Area var area = d3.svg.area() .x(function(d) { return x(d.date); }) .y0(function(d) { return y(d.y0); }) .y1(function(d) { return y(d.y0 + d.y); }); // Stack var stack = d3.layout.stack() .values(function(d) { return d.values; }); // Load data // ------------------------------ d3.tsv("assets/demo_data/d3/lines/lines_stacked.tsv", function(error, data) { // Pull out values data.forEach(function(d) { d.date = parseDate(d.date); }); // Set color domains // ------------------------------ // Filter by date color.domain(d3.keys(data[0]).filter(function(key) { return key !== "date"; })); // Set colors var browsers = stack(color.domain().map(function(name) { return { name: name, values: data.map(function(d) { return {date: d.date, y: d[name] / 100}; }) }; })); // Set input domains // ------------------------------ // Horizontal x.domain(d3.extent(data, function(d) { return d.date; })); // // Append chart elements // // Bind data var browser = svg.selectAll(".browser") .data(browsers) .enter() .append("g") .attr("class", "browser"); // Add area browser.append("path") .attr("class", "d3-area") .attr("d", function(d) { return area(d.values); }) .style("fill", function(d) { return color(d.name); }); // Add text browser.append("text") .datum(function(d) { return {name: d.name, value: d.values[d.values.length - 1]}; }) .attr("transform", function(d) { return "translate(" + x(d.value.date) + "," + y(d.value.y0 + d.value.y / 2) + ")"; }) .attr("class", "d3-browsers") .attr("x", -15) .attr("dy", ".35em") .style("fill", "#fff") .style("text-anchor", "end") .text(function(d) { return d.name; }); // Append axes // ------------------------------ // Horizontal svg.append("g") .attr("class", "d3-axis d3-axis-horizontal d3-axis-strong") .attr("transform", "translate(0," + height + ")") .call(xAxis); // Vertical svg.append("g") .attr("class", "d3-axis d3-axis-vertical d3-axis-strong") .call(yAxis); }); // 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 // ------------------------- // Line path svg.selectAll('.d3-area').attr("d", function(d) { return area(d.values); }); // Text svg.selectAll('.d3-browsers').attr("transform", function(d) { return "translate(" + x(d.value.date) + "," + y(d.value.y0 + d.value.y / 2) + ")"; }); } } });