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Stacked Aera Spline Transition
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| svg { | |
| font: 10px sans-serif; | |
| } | |
| .Beer { | |
| fill: #ccc; | |
| stroke: none; | |
| stroke-width: 1.5px; | |
| } | |
| .Wine { | |
| fill: #ddd; | |
| stroke: none; | |
| stroke-width: 1.5px; | |
| } | |
| .axis path, .axis line { | |
| fill: none; | |
| stroke: #000; | |
| shape-rendering: crispEdges; | |
| } | |
| </style> | |
| <body> | |
| <script src="http://mbostock.github.com/d3/d3.js?2.7.2"></script> | |
| <script> | |
| var margin = {top: 10, right: 10, bottom: 20, left: 40}, | |
| width = 960 - margin.left - margin.right, | |
| height = 500 - margin.top - margin.bottom, | |
| duration = 2000, | |
| domain = [new Date(2012, 01, 01), new Date(2012, 01, 29)], | |
| random = d3.random.normal(10, 2.5), | |
| context = ['Beer','Wine'], | |
| data = d3.layout.stack()(context.map(function(k){ | |
| return d3.time.days(domain[0],domain[1]).map(function(d){ | |
| return {x:d, y:random(), key:k}; | |
| }) | |
| })), | |
| x = d3.time.scale().domain(domain).range([0, width]), | |
| y = d3.scale.linear().domain([0,d3.max(d3.merge(data),function(d){return d.y0 + d.y;})]).range([height,0]); | |
| var area = d3.svg.area() | |
| .interpolate("basis") | |
| .x(function(d) { return x(d.x); }) | |
| .y0(function(d) { return y(d.y0); }) | |
| .y1(function(d) { return y(d.y0+d.y); }); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width + margin.left + margin.right) | |
| .attr("height", height + margin.top + margin.bottom) | |
| .append("g") | |
| .attr("transform", "translate(" + margin.left + "," + margin.top + ")"); | |
| svg.append("defs").append("clipPath") | |
| .attr("id", "clip") | |
| .append("rect") | |
| .attr("width", width) | |
| .attr("height", height); | |
| var axis = svg.append("g") | |
| .attr("class", "x axis") | |
| .attr("transform", "translate(0," + height + ")") | |
| .call(x.axis = d3.svg.axis().scale(x).orient("bottom")); | |
| svg.append("g") | |
| .attr("class", "y axis") | |
| .call(d3.svg.axis().scale(y).orient("left")); | |
| var g = svg.append("g") | |
| .attr("clip-path", "url(#clip)"); | |
| var path = g.selectAll('path') | |
| .data(data) | |
| .enter().append('path') | |
| .attr("class", function(d){ return 'area '+d[0].key;}) | |
| .attr("d", function(d){ return area(d)}); | |
| setTimeout(tick, duration); | |
| function tick() { | |
| var past = domain[0]; | |
| //slide window | |
| domain[0].setDate(domain[0].getDate()+1); | |
| domain[1].setDate(domain[1].getDate()+1); | |
| // reset x | |
| x.domain(domain); | |
| // push a new data point onto the back | |
| var my = 0; | |
| data.forEach(function(d,i){ | |
| var r = random(); | |
| d.push({x:domain[1],y:r,y0:my,key:context[i]}); | |
| my += r; | |
| }); | |
| // rest y | |
| y.domain([0,Math.max(my,y.domain()[1])]); | |
| // redraw the area | |
| d3.selectAll('path.area') | |
| .attr("d", area) | |
| .attr("transform", null); | |
| // slide the x-axis left | |
| axis.transition() | |
| .duration(duration) | |
| .ease("linear") | |
| .call(x.axis); | |
| // slide it to the left | |
| d3.selectAll('path.area') | |
| .transition() | |
| .duration(duration) | |
| .ease("linear") | |
| .attr("transform", "translate(" + x(domain[0]) + ")"); | |
| // pop the old data point off the front | |
| data.forEach(function(d){ | |
| d.shift(); | |
| }); | |
| setTimeout(tick, duration); | |
| } | |
| </script> |
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