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Line Transition
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .axis path, .axis line { | |
| fill: none; | |
| stroke: black; | |
| shape-rendering: crispEdges; | |
| } | |
| .axis text { | |
| font-family: sans-serif; | |
| font-size: 11px; | |
| } | |
| path.line { | |
| fill: none; | |
| stroke: black; | |
| } | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 500, | |
| chart_width = 800, | |
| chart_height = 100, | |
| data = []; | |
| var margin = { | |
| left: (width - chart_width) / 2, | |
| top: (height - chart_height) / 2 | |
| } | |
| var x = d3.scale.linear().domain([0, 79]).range([0, chart_width]); | |
| var y = d3.scale.linear().domain([0, 1]).range([chart_height, 0]); | |
| var yAxis = d3.svg.axis().scale(y) | |
| .orient('left').ticks(5); | |
| var line = d3.svg.line() | |
| .x(function(d, i) { return x(i); }) | |
| .y(function(d) { return y(d); }); | |
| var svg = d3.select('body').append('svg') | |
| .attr('width', width) | |
| .attr('height', height) | |
| .append('g') | |
| .attr('width', chart_width) | |
| .attr('height', chart_height) | |
| .attr('transform', 'translate(' + margin.left + ',' + | |
| margin.top + ')'); | |
| svg.append('defs').append('clipPath') | |
| .attr('id', 'clip') | |
| .append('rect') | |
| .attr('width', chart_width) | |
| .attr('height', chart_height); | |
| svg.append('g') | |
| .attr('class', 'y axis').call(yAxis) | |
| for (var i = 0; i < 80; i++) { | |
| data.push(Math.random()); | |
| } | |
| var path = svg.append('g') | |
| .attr('clip-path', 'url(#clip)') | |
| .append('path') | |
| .datum(data) | |
| .attr('class', 'line') | |
| .attr('d', line); | |
| function update_chart() { | |
| data.push(Math.random()); | |
| path.attr('d', line) | |
| .attr('transform', null) | |
| .transition().duration(200) | |
| .ease('linear') | |
| .attr('transform', 'translate(' + x(-1) + ')') | |
| .each('end', update_chart); | |
| data.shift(); | |
| } | |
| update_chart(); | |
| </script> | |
| </body> |
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