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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: 14px 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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stroke-width: 1.5px; |
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shape-rendering: crispEdges; |
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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: 3.5px; |
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} |
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.dot { |
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stroke: #000; |
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} |
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div.tooltip { |
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position: absolute; |
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text-align: center; |
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width: 80px; |
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height: 55px; |
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padding: 4px; |
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font: 16px sans-serif; |
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color: white; |
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font-weight: 500; |
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background: black; |
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border: 0px; |
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border-radius: 4px; |
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pointer-events: none; |
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} |
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/* http://www.d3noob.org/2013/01/adding-grid-lines-to-d3js-graph.html */ |
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.grid .tick { |
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stroke: lightgrey; |
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opacity: 0.7; |
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} |
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</style> |
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<body> |
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<script src="http://d3js.org/d3.v3.js"></script> |
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<script> |
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//I increased the bottom margin a little bit because the x label is tied to it; so I could lower the x label a little bit |
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var margin = {top: 50, right: 20, bottom: 60, left: 90}, |
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width = 600 - margin.left - margin.right, |
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height = 400 - margin.top - margin.bottom; |
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var x = d3.time.scale() |
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.range([0, width]); |
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var y = d3.scale.linear() |
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.range([height, 0]); |
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var xAxis = d3.svg.axis() |
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.scale(x) |
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.ticks(d3.time.hours,24) |
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//makes the xAxis ticks a little longer than the xMinorAxis ticks |
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.tickSize(10) |
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.orient("bottom"); |
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var xMinorAxis = d3.svg.axis() |
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.scale(x) |
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.ticks(d3.time.hours,12) |
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.orient("bottom"); |
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var yAxis = d3.svg.axis() |
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.scale(y) |
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.orient("left"); |
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var line = d3.svg.line() |
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.x(function(d) { return x(d.date); }) |
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.y(function(d) { return y(d.total_km); }); |
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var div = d3.select("body").append("div") |
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.attr("class", "tooltip") |
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.style("opacity", 0); |
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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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//The format in the CSV, which d3 will read |
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var parseDate = d3.time.format("%Y-%m-%d %X"); |
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//format for tooltip |
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//https://github.com/mbostock/d3/wiki/Time-Formatting |
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//var formatTime = d3.time.format("%e %b"); |
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var formatTime = d3.time.format("%e %b %-I:%M %p"); |
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var formatCount = d3.format(","); |
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// function for the y grid lines |
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function make_y_axis() { |
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return d3.svg.axis() |
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.scale(y) |
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.orient("left") |
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//.ticks(5) |
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} |
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//reading in CSV which contains data |
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d3.csv("roads_built.csv", function(error, data) { |
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data.forEach(function(d) { |
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//console.log(d.date_time) |
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d.date = parseDate.parse(d.date_time); |
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console.log(d.date); |
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d.total_km = +d.total_km; |
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console.log(d.total_km); |
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}); |
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//using imported data to define extent of x and y domains |
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x.domain(d3.extent(data, function(d) { return d.date; })); |
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y.domain(d3.extent(data, function(d) { return d.total_km; })); |
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// Draw the y Grid lines |
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svg.append("g") |
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.attr("class", "grid") |
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.call(make_y_axis() |
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.tickSize(-width, 0, 0) |
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.tickFormat("") |
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) |
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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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//taken from http://bl.ocks.org/mbostock/3887118 |
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//and http://www.d3noob.org/2013/01/change-line-chart-into-scatter-plot.html |
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//creating a group(g) and will append a circle and 2 lines inside each group |
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var g = svg.selectAll() |
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.data(data).enter().append("g"); |
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//The markers on the line |
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g.append("circle") |
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//circle radius is increased |
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.attr("r", 4.5) |
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.attr("cx", function(d) { return x(d.date); }) |
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.attr("cy", function(d) { return y(d.total_km); }); |
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//The horizontal dashed line that appears when a circle marker is moused over |
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g.append("line") |
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.attr("class", "x") |
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.attr("id", "dashedLine") |
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.style("stroke", "steelblue") |
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.style("stroke-dasharray", "3,3") |
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.style("opacity", 0) |
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.attr("x1", function(d) { return x(d.date); }) |
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.attr("y1", function(d) { return y(d.total_km); }) |
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//d3.min gets the min date from the date x-axis scale |
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.attr("x2", function(d) { return x(d3.min(x)); }) |
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.attr("y2", function(d) { return y(d.total_km); }); |
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//The vertical dashed line that appears when a circle marker is moused over |
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g.append("line") |
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.attr("class", "y") |
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.attr("id", "dashedLine") |
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.style("stroke", "steelblue") |
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.style("stroke-dasharray", "3,3") |
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.style("opacity", 0) |
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.attr("x1", function(d) { return x(d.date); }) |
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.attr("y1", function(d) { return y(d.total_km); }) |
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.attr("x2", function(d) { return x(d.date); }) |
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.attr("y2", height); |
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//circles are selected again to add the mouseover functions |
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g.selectAll("circle") |
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.on("mouseover", function(d) { |
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div.transition() |
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.duration(200) |
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.style("opacity", .9); |
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div.html(formatCount(d.total_km) + " km" + "<br/>" + formatTime(d.date)) |
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.style("left", (d3.event.pageX - 20) + "px") |
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.style("top", (d3.event.pageY + 6) + "px"); |
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//selects the horizontal dashed line in the group |
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d3.select(this.nextElementSibling).transition() |
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.duration(200) |
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.style("opacity", .9); |
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//selects the vertical dashed line in the group |
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d3.select(this.nextElementSibling.nextElementSibling).transition() |
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.duration(200) |
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.style("opacity", .9); |
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}) |
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.on("mouseout", function(d) { |
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div.transition() |
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.duration(500) |
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.style("opacity", 0); |
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d3.select(this.nextElementSibling).transition() |
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.duration(500) |
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.style("opacity", 0); |
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d3.select(this.nextElementSibling.nextElementSibling).transition() |
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.duration(500) |
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.style("opacity", 0); |
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}); |
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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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.selectAll(".tick text") |
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.call(wrap, 35); |
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svg.append("g") |
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.attr("class","xMinorAxis") |
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.attr("transform", "translate(0," + height + ")") |
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.style({ 'stroke': 'Black', 'fill': 'none', 'stroke-width': '1px'}) |
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.call(xMinorAxis) |
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.selectAll("text").remove(); |
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//http://www.d3noob.org/2012/12/adding-axis-labels-to-d3js-graph.html |
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svg.append("text") // text label for the x-axis |
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.attr("x", width / 2 ) |
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.attr("y", height + margin.bottom) |
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.style("text-anchor", "middle") |
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.text("Date"); |
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svg.append("text") // text label for the y-axis |
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.attr("y",30 - margin.left) |
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.attr("x",50 - (height / 2)) |
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.attr("transform", "rotate(-90)") |
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.style("text-anchor", "end") |
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.style("font-size", "16px") |
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.text("road length (km)"); |
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//http://www.d3noob.org/2013/01/adding-title-to-your-d3js-graph.html |
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svg.append("text") // text label for chart Title |
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.attr("x", width / 2 ) |
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.attr("y", 0 - (margin.top/2)) |
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.style("text-anchor", "middle") |
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.style("font-size", "16px") |
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.style("text-decoration", "underline") |
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.text("Pandora Road Construction"); |
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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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//text label for the y-axis inside chart |
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/* |
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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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.style("font-size", "16px") |
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.style("background-color","red") |
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.text("road length (km)"); |
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*/ |
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//http://bl.ocks.org/mbostock/7555321 |
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//This code wraps label text if it has too much text |
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function wrap(text, width) { |
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text.each(function() { |
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var text = d3.select(this), |
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words = text.text().split(/\s+/).reverse(), |
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word, |
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line = [], |
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lineNumber = 0, |
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lineHeight = 1.1, // ems |
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y = text.attr("y"), |
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dy = parseFloat(text.attr("dy")), |
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tspan = text.text(null).append("tspan").attr("x", 0).attr("y", y).attr("dy", dy + "em"); |
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while (word = words.pop()) { |
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line.push(word); |
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tspan.text(line.join(" ")); |
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if (tspan.node().getComputedTextLength() > width) { |
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line.pop(); |
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tspan.text(line.join(" ")); |
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line = [word]; |
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tspan = text.append("tspan").attr("x", 0).attr("y", y).attr("dy", ++lineNumber * lineHeight + dy + "em").text(word); |
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} |
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} |
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}); |
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} |
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}); |
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</script> |
