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function timeSeriesChart() { |
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var margin = {top: 20, right: 20, bottom: 20, left: 20}, |
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width = 760, |
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height = 120, |
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xValue = function(d) { return d[0]; }, |
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yValue = function(d) { return d[1]; }, |
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xScale = d3.time.scale(), |
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yScale = d3.scale.linear(), |
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xAxis = d3.svg.axis().scale(xScale).orient("bottom").tickSize(6, 0), |
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area = d3.svg.area().x(X).y1(Y), |
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line = d3.svg.line().x(X).y(Y); |
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function chart(selection) { |
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selection.each(function(data) { |
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|
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// Convert data to standard representation greedily; |
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// this is needed for nondeterministic accessors. |
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data = data.map(function(d, i) { |
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return [xValue.call(data, d, i), yValue.call(data, d, i)]; |
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}); |
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// Update the x-scale. |
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xScale |
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.domain(d3.extent(data, function(d) { return d[0]; })) |
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.range([0, width - margin.left - margin.right]); |
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// Update the y-scale. |
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yScale |
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.domain([0, d3.max(data, function(d) { return d[1]; })]) |
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.range([height - margin.top - margin.bottom, 0]); |
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// Select the svg element, if it exists. |
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var svg = d3.select(this).selectAll("svg").data([data]); |
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// Otherwise, create the skeletal chart. |
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var gEnter = svg.enter().append("svg").append("g"); |
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gEnter.append("path").attr("class", "area"); |
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gEnter.append("path").attr("class", "line"); |
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gEnter.append("g").attr("class", "x axis"); |
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// Update the outer dimensions. |
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svg .attr("width", width) |
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.attr("height", height); |
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// Update the inner dimensions. |
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var g = svg.select("g") |
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.attr("transform", "translate(" + margin.left + "," + margin.top + ")"); |
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// Update the area path. |
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g.select(".area") |
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.attr("d", area.y0(yScale.range()[0])); |
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// Update the line path. |
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g.select(".line") |
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.attr("d", line); |
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// Update the x-axis. |
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g.select(".x.axis") |
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.attr("transform", "translate(0," + yScale.range()[0] + ")") |
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.call(xAxis); |
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}); |
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} |
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// The x-accessor for the path generator; xScale ∘ xValue. |
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function X(d) { |
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return xScale(d[0]); |
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} |
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// The x-accessor for the path generator; yScale ∘ yValue. |
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function Y(d) { |
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return yScale(d[1]); |
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} |
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chart.margin = function(_) { |
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if (!arguments.length) return margin; |
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margin = _; |
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return chart; |
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}; |
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chart.width = function(_) { |
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if (!arguments.length) return width; |
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width = _; |
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return chart; |
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}; |
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chart.height = function(_) { |
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if (!arguments.length) return height; |
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height = _; |
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return chart; |
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}; |
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chart.x = function(_) { |
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if (!arguments.length) return xValue; |
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xValue = _; |
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return chart; |
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}; |
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chart.y = function(_) { |
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if (!arguments.length) return yValue; |
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yValue = _; |
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return chart; |
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}; |
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return chart; |
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} |
