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<!DOCTYPE html> |
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<meta charset="utf-8"> |
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<style> |
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body { |
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font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; |
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margin: auto; |
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position: relative; |
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width: 960px; |
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} |
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text { |
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font: 10px sans-serif; |
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} |
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.axis path, |
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.axis line { |
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fill: none; |
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stroke: #000; |
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shape-rendering: crispEdges; |
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} |
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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: steelblue; |
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stroke-width: 1.5px; |
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} |
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form { |
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position: absolute; |
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right: 10px; |
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top: 10px; |
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} |
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</style> |
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<form> |
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<label><input type="radio" name="city" value="New York" checked> New York</label> |
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<label><input type="radio" name="city" value="San Francisco"> San Francisco</label> |
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</form> |
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<script src="//d3js.org/d3.v4.min.js"></script> |
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<script> |
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var margin = {top: 20, right: 80, bottom: 30, left: 50}, |
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width = 960 - margin.left - margin.right, |
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height = 500 - margin.top - margin.bottom; |
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var city = "New York", |
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parseDate = d3.timeParse("%Y%m%d"); |
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var x = d3.scaleTime() |
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.range([0, width]); |
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var y = d3.scaleLinear() |
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.range([height, 0]); |
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var xAxis = d3.axisBottom() |
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.scale(x); |
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var yAxis = d3.axisLeft() |
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.scale(y); |
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var line = d3.line() |
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.curve(d3.curveBasis) |
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.x(function(d) { return x(d.date); }) |
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.y(function(d) { return y(d[city]); }); |
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var color = d3.scaleOrdinal(d3.schemeCategory10 ) |
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.domain(["New York", "San Francisco"]) |
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var svg = d3.select("body").append("svg") |
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.attr("width", width + margin.left + margin.right) |
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.attr("height", height + margin.top + margin.bottom) |
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.append("g") |
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.attr("transform", "translate(" + margin.left + "," + margin.top + ")"); |
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d3.tsv("data.tsv", function(error, data) { |
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if (error) throw error; |
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data.forEach(function(d) { |
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d.date = parseDate(d.date); |
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d["New York"] = +d["New York"]; |
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d["San Francisco"] = +d["San Francisco"]; |
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}); |
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x.domain([data[0].date, data[data.length - 1].date]); |
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y.domain(d3.extent(data, function(d) { return d[city]; })); |
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svg.append("g") |
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.attr("class", "x axis") |
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.attr("transform", "translate(0," + height + ")") |
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.call(xAxis); |
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svg.append("g") |
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.attr("class", "y axis") |
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.call(yAxis) |
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.append("text") |
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.attr("transform", "rotate(-90)") |
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.attr("y", 6) |
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.attr("dy", ".71em") |
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.style("text-anchor", "end") |
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.text("Temperature (ºF)"); |
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svg.append("path") |
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.datum(data) |
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.attr("class", "line") |
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.attr("d", line); |
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svg.append("text") |
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.datum(data[data.length - 1]) |
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.attr("class", "label") |
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.attr("transform", transform) |
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.attr("x", 3) |
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.attr("dy", ".35em") |
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.text(city); |
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d3.selectAll("input").on("change", change); |
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var timeout = setTimeout(function() { |
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d3.select("input[value=\"San Francisco\"]").property("checked", true).each(change); |
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}, 2000); |
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console.clear() |
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function change() { |
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clearTimeout(timeout); |
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var oldCity = city, |
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newCity = this.value; |
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// First transition the y-axis to the combined extent |
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y.domain(d3.extent(d3.merge([ |
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d3.extent(data, function(d) { return d[oldCity]; }), |
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d3.extent(data, function(d) { return d[newCity]; }) |
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]))); |
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console.log(city + " -(0)-> " + newCity, y.domain()) |
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var t0 = svg.transition().duration(750); |
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t0.selectAll(".line").attr("d", line); |
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t0.selectAll(".label").attr("transform", transform); |
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t0.selectAll(".y.axis").call(yAxis); |
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city = this.value; |
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console.log(oldCity + " -(1)-> " + newCity, y.domain()) |
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// Then transition the line & label to the new city. |
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var t1 = t0.transition(); |
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t1.selectAll(".line").attr("d", line).style("stroke", color(newCity)); |
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t1.selectAll(".label").attr("transform", transform).text(newCity); |
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// Then transition the y-axis to the new city's range. |
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y.domain(d3.extent(data, function(d) { return d[newCity]; })); |
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console.log(oldCity + " -(2)-> " + newCity, y.domain()) |
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var t2 = t1.transition(); |
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t2.selectAll(".line").attr("d", line); |
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t2.selectAll(".label").attr("transform", transform); |
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t2.selectAll(".y.axis").call(yAxis); |
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} |
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function transform(d) { |
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return "translate(" + x(d.date) + "," + y(d[city]) + ")"; |
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} |
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}); |
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</script> |