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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: 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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.axis text { |
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font: 10px sans-serif; |
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} |
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.bar { |
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fill: orange; |
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} |
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.bar:hover { |
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fill: orangered ; |
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} |
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/* |
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.d3-tip { |
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line-height: 1; |
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font-weight: bold; |
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padding: 12px; |
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background: rgba(0, 0, 0, 0.8); |
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color: #fff; |
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border-radius: 2px; |
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}*/ |
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/* Creates a small triangle extender for the tooltip */ |
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/*.d3-tip:after { |
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box-sizing: border-box; |
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display: inline; |
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font-size: 10px; |
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width: 100%; |
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line-height: 1; |
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color: rgba(0, 0, 0, 0.8); |
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content: "\25BC"; |
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position: absolute; |
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text-align: center; |
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}*/ |
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/* Style northward tooltips differently */ |
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/*.d3-tip.n:after { |
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margin: -1px 0 0 0; |
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top: 100%; |
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left: 0; |
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}*/ |
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.chart text { |
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font: 12px sans-serif; |
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} |
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</style> |
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<svg class = "chart"></svg> |
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<script src="http://d3js.org/d3.v3.min.js"></script> |
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<script src="http://labratrevenge.com/d3-tip/javascripts/d3.tip.v0.6.3.js"></script> |
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<script> |
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var quakes; //global variable |
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var url = "http://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/4.5_day.geojson"; |
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var margin = {top: 20, right: 30, bottom: 30, left: 40}, |
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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 formatPercent = d3.format(".0%"); |
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var x = d3.scale.linear() // Note from PB: Changed scale from ordinal to linear |
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.range([0, width]) // Note from PB: Changed range to [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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.tickValues ([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]) |
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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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//.tickFormat(formatPercent); |
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var tip = d3.tip() |
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.attr('class', 'd3-tip') |
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.offset([-10, 0]) |
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.html(function(d) { |
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return "<strong>Frequency:</strong> <span style='color:red'>" + d.frequency + "</span>"; |
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}) |
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var chart = d3.select(".chart") //.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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//svg.call(tip); |
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d3.json(url, function(error, data) { |
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if (error) console.log(error); |
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console.log("Data from USGS:", data); |
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quakes = data |
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quakesMag = []; |
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quakesMag = data.features.map(function(d) { return d.properties.mag; }); |
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console.log("Earthquake Magnitude:", quakesMag); |
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quakesBin = []; // empty array to bin the mag values |
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for (var i = 0; i < 10; i++) { |
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quakesBin[i] = quakesMag.filter(function(d) { return d >= i && d < i + 1;}).length; |
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} |
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x.domain([0, quakesBin.length]); |
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// y.domain([d3.min(quakesBin, function(d) { return d.frequency; })]); |
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y.domain(d3.extent(quakesBin)); |
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var barWith = width / quakesMag.length; |
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chart.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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chart.append("g") |
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.attr("class", "y axis") |
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.call(yAxis); |
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chart.append("text") // append for y axis label |
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.attr("transform", "rotate(-90)") |
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.attr("x", -height/2) |
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.attr("y", -1 - margin.left/3) |
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.attr("dy", ".71em") |
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.attr("text-anchor", "middle") |
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.text("Earthquake Frequency"); |
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chart.append("text") // append for x axis label |
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.attr("text-anchor", "end") |
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.attr("x", width/2) |
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.attr("y", height + 2*margin.bottom/3 + 9) |
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.text("Earthquake Magnitude"); |
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chart.append("text") // append title |
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.attr("text-anchor", "middle") |
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.attr("x", width/2) |
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.attr("y", -margin.top/2) |
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.attr("dy", "+.75em") |
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.text("Earthquake Occurences - 4.5 days"); |
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// chart.selectAll(".bar") // Note from PB: Commented this line |
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// .data(quakesBin) // Note from PB: Commented this line |
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// .enter().append("rect") // Note from PB: Commented this line |
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// .attr("class", "bar") // Note from PB: Commented this line |
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chart.selectAll("rect") |
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.data(quakesBin) |
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.enter().append("rect") // Note from PB: added this line |
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.attr("x", function(d, i) { return x(i); }) |
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.attr("y", function(d) { return y(d); }) // Note from PB: Changed "d.properties" to "d" |
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.attr("height", function(d) { return height - y(d); }) // Note from PB: Changed "d.properties" to "d" |
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.attr("width", barWith) |
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//move mouse |
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/* |
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.on('mouseover', tip.show) |
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.on('mouseout', tip.hide);*/ |
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}); |
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/*function type(d) { |
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d.frequency = +d.frequency; |
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return d; |
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}*/ |
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</script> |
