/* ------------------------------------------------------------------------------ * * # D3.js - stacked nested area chart * * Demo d3.js stacked nested area chart setup with .tsv data source * * Version: 1.0 * Latest update: August 1, 2015 * * ---------------------------------------------------------------------------- */ $(function () { // Initialize chart areaNested('#d3-area-stacked-nest', 400); // Chart setup function areaNested(element, height) { // Basic setup // ------------------------------ // Define main variables var d3Container = d3.select(element), margin = {top: 5, right: 20, bottom: 20, left: 40}, n = 3, width = d3Container.node().getBoundingClientRect().width - margin.left - margin.right, height = height - margin.top - margin.bottom - 5; // Format data var format = d3.time.format("%m/%d/%y"); // Construct scales // ------------------------------ // Horizontal var x = d3.time.scale() .range([0, width]); // Vertical var y = d3.scale.linear() .range([height, 0]); // Colors var z = d3.scale.linear() .domain([0, n - 1]) .range(["#4DB6AC", "#B2DFDB"]); // Create axes // ------------------------------ // Horizontal var xAxis = d3.svg.axis() .scale(x) .orient("bottom") .ticks(d3.time.days); // Vertical var yAxis = d3.svg.axis() .scale(y) .orient("left"); // 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 // ------------------------------ // Stack var stack = d3.layout.stack() .offset("zero") .values(function(d) { return d.values; }) .x(function(d) { return d.date; }) .y(function(d) { return d.value; }); // Nest var nest = d3.nest() .key(function(d) { return d.key; }); // Area var area = d3.svg.area() .interpolate("basis") .x(function(d) { return x(d.date); }) .y0(function(d) { return y(d.y0); }) .y1(function(d) { return y(d.y0 + d.y); }); // Load data // ------------------------------ d3.csv("assets/demo_data/d3/lines/lines_stacked_nest.csv", function(error, data) { // Pull out values data.forEach(function(d) { d.date = format.parse(d.date); d.value = +d.value; }); // Pull out nested entries var layers = stack(nest.entries(data)); // Set input domains // ------------------------------ // Horizontal x.domain(d3.extent(data, function(d) { return d.date; })); // Vertical y.domain([0, d3.max(data, function(d) { return d.y0 + d.y; })]); // // Append chart elements // // Add area svg.selectAll(".d3-area") .data(layers) .enter() .append("path") .attr("class", "d3-area") .attr("d", function(d) { return area(d.values); }) .style("stroke", "#fff") .style("stroke-width", 0.5) .style("fill", function(d, i) { return z(i); }); // 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); }) } } });