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<!DOCTYPE html> |
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<meta charset="utf-8"> |
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<style> |
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/*.x-axis path { |
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display: none; |
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}*/ |
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.line { |
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fill: none; |
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stroke: Plum; |
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stroke-width: 1.5px; |
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} |
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/*When line is attached with class "hovering, darken and thicken line*/ |
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text.text.hovering { |
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fill: black; |
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} |
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text.text { |
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font: bold 10px sans-serif; |
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fill: transparent; |
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} |
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.hovering > path.line { |
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stroke-width: 5px; |
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stroke: Indigo; |
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} |
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.hovering > text { |
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fill: black; |
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} |
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/*line:hover { |
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stroke-width: 5; |
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}*/ |
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</style> |
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<svg width="900" height="500"></svg> |
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<script src="//d3js.org/d3.v4.min.js"></script> |
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<script> |
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var svg = d3.select("svg"), |
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margin = {top: 30, right: 80, bottom: 30, left: 50}, |
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w = svg.attr("width") - margin.left - margin.right, |
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h = svg.attr("height") - margin.top - margin.bottom; |
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var xScale = d3.scaleTime().range([0, w]), |
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yScale = d3.scaleLinear().range([h, 0]), |
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ordinalScale = d3.scaleOrdinal(d3.schemeCategory10); |
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var g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")"); |
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var parseTime = d3.timeParse("%Y%m%d"); |
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var line = d3.line() |
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.curve(d3.curveBasis) |
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.x(function(d) { return xScale(d.date); }) |
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.y(function(d) { return yScale(d.count); }); |
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d3.csv("names.csv", type, function(error, data) { |
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if (error) throw error; |
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// setup name data. Creates objects with each name as the id and count & date as values associated with each name. |
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var names = data.columns.slice(1).map(function(id) { |
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return { |
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id: id, |
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values: data.map(function(d) { |
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return {date: d.date, count: d[id]}; |
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}) |
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}; |
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}); |
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// x, y, and ordinal(name data) scales |
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xScale.domain(d3.extent(data, function(d) { return d.date; })); |
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yScale.domain([0, |
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d3.max(names, function(c) { return d3.max(c.values, function(d) { return d.count; }); }) |
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]); |
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ordinalScale.domain(names.map(function(c) { return c.id; })); |
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// add chart title |
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g.append("text") |
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.attr("x", (w / 2)) |
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.attr("y", 0 - (margin.top / 2)) |
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.attr("text-anchor", "middle") |
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.attr("font-family", "sans-serif") |
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.attr("font-weight", "bold") |
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.style("font-size", "16px") |
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.text("Most popular female baby names of 1986 (plus Mollie) over time"); |
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// x axis |
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g.append("g") |
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.attr("class", "axis x-axis") |
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.attr("transform", "translate(0," + h + ")") |
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.call(d3.axisBottom(xScale)); |
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// Y axis |
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g.append("g") |
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.attr("class", "axis y-axis") |
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.call(d3.axisLeft(yScale)) |
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.append("text") |
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.attr("transform", "translate(" + (-margin.left + 8) + "," + ((h - margin.top - margin.bottom)/2) + ") rotate(-90)") |
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.attr("fill", "#000") |
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.style("text-anchor", "center") |
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.text("Babies"); |
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var name = g.selectAll(".name") |
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.data(names) |
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.enter().append("g") |
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.attr("class", "name"); |
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// create lines |
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var namePath = name.append("path") |
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.attr("class", "line") |
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.attr("d", function(d) { return line(d.values); }) |
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// on mouseover of line, attach "hovering" class to line |
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// add name labels |
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var nameText = name.append("text") |
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.datum(function(d) { return {id: d.id, value: d.values[d.values.length - 1]}; }) |
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.attr("class", "text") |
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.attr("transform", function(d) { return "translate(" + xScale(d.value.date) + "," + yScale(d.value.count) + ")"; }) |
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.attr("x", 3) |
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.attr("dy", "0.35em") |
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.text(function(d) { return d.id; }); |
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// when you mouseover name labels, add "hovering" class to associated line |
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function handleHover (currentElement) { |
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currentElement.on("mouseover", function () { |
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d3.select(this.parentElement).classed("hovering", true); |
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}).on("mouseleave", function() { |
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d3.select(this.parentElement).classed("hovering", false); |
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}); |
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} |
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handleHover(namePath) |
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handleHover(nameText); |
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}); |
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// parse dates |
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function type(d, _, columns) { |
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d.date = parseTime(d.date); |
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for (var i = 1, n = columns.length, c; i < n; ++i) d[c = columns[i]] = +d[c]; |
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return d; |
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} |
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</script> |
