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Created
September 7, 2016 04:22
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| license: mit |
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| [ | |
| {"code":23802620, "grade":4.85}, | |
| {"code":23802825, "grade":4.865}, | |
| {"code":23801894, "grade":3.24}, | |
| {"code":23802926, "grade":5}, | |
| {"code":23800661, "grade":3.19}, | |
| {"code":23800768, "grade":3.98}, | |
| {"code":23800972, "grade":4.89}, | |
| {"code":23801922, "grade":3.73}, | |
| {"code":23805498, "grade":4.795}, | |
| {"code":23805913, "grade":4.85}, | |
| {"code":23800311, "grade":2.81}, | |
| {"code":23806395, "grade":4.72}, | |
| {"code":23808850, "grade":3.85}, | |
| {"code":23802872, "grade":2.16}, | |
| {"code":23802105, "grade":4.715}, | |
| {"code":23809880, "grade":4.92}, | |
| {"code":23802056, "grade":4.48}, | |
| {"code":23807897, "grade":5.2}, | |
| {"code":23807916, "grade":5}, | |
| {"code":23801962, "grade":3.62}, | |
| {"code":23808246, "grade":4.61}, | |
| {"code":23802600, "grade":0.11}, | |
| {"code":23808311, "grade":4.7} | |
| ] |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <head> | |
| <style> | |
| .bar{ | |
| fill: orange; | |
| } | |
| .bar:hover{ | |
| fill: brown; | |
| } | |
| .axis { | |
| font: 10px sans-serif; | |
| } | |
| .axis path, | |
| .axis line { | |
| fill: none; | |
| stroke: #000; | |
| shape-rendering: crispEdges; | |
| } | |
| .tooltip { | |
| position: absolute; | |
| width: 150px; | |
| height: 35px; | |
| pointer-events: none; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| // set the dimensions of the canvas | |
| var margin = {top: 20, right: 20, bottom: 70, left: 40}, | |
| width = 600 - margin.left - margin.right, | |
| height = 300 - margin.top - margin.bottom; | |
| // set the ranges | |
| var x = d3.scale.ordinal().rangeRoundBands([0, width], .05); | |
| var y = d3.scale.linear().range([height, 0]); | |
| //Tooltip | |
| var tooltip = d3.select("body").append("div") | |
| .attr("class", "tooltip"); | |
| // define the axis | |
| var xAxis = d3.svg.axis() | |
| .scale(x) | |
| .orient("bottom") | |
| var yAxis = d3.svg.axis() | |
| .scale(y) | |
| .orient("left") | |
| .ticks(10); | |
| // add the SVG element | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width + margin.left + margin.right) | |
| .attr("height", height + margin.top + margin.bottom) | |
| .append("g") | |
| .attr("transform", | |
| "translate(" + margin.left + "," + margin.top + ")"); | |
| // load the data | |
| d3.json("data.json", function(error, data) { | |
| data.forEach(function(d) { | |
| d.code = +d.code; | |
| d.grade = +d.grade; | |
| }); | |
| // scale the range of the data | |
| x.domain(data.map(function(d) { return d.code; })); | |
| y.domain([0, d3.max(data, function(d) { return d.grade; })]); | |
| // add axis | |
| svg.append("g") | |
| .transition().duration(3000) | |
| .attr("class", "x axis") | |
| .attr("transform", "translate(0," + height + ")") | |
| .call(xAxis) | |
| .selectAll("text") | |
| .style("text-anchor", "end") | |
| .attr("dx", "-.8em") | |
| .attr("dy", "-.55em") | |
| .attr("transform", "rotate(-90)" ); | |
| svg.append("g") | |
| .transition().duration(3000) | |
| .attr("class", "y axis") | |
| .call(yAxis) | |
| svg.append("text") | |
| .attr("transform", "rotate(-90)") | |
| .attr("y", 5) | |
| .attr("dy", ".71em") | |
| .style("text-anchor", "end"); | |
| var bars = svg.selectAll(".bars") | |
| .data(data); | |
| //Enter | |
| var barsEnter = bars.enter() | |
| .append("rect") | |
| .attr("class", "bar") | |
| .attr("x", function(d) { return x(d.code); }) | |
| .attr("width", x.rangeBand()) | |
| .attr("y", function(d) { return y(d.grade); }) | |
| .attr("height", function(d) { return height - y(d.grade); }); | |
| //Exit | |
| bars.exit() | |
| .transition() | |
| .duration(1000) | |
| .attr("width", 0) | |
| .remove(); | |
| // Add bar chart | |
| svg.selectAll("bar") | |
| .data(data) | |
| .enter() | |
| .append("rect") | |
| .attr("class", "bar") | |
| .attr("x", function(d) { return x(d.code); }) | |
| .attr("width", x.rangeBand()) | |
| .attr("y", function(d) { return y(d.grade); }) | |
| .attr("height", function(d) { return height - y(d.grade); }) | |
| .on("mouseover", function(d) { | |
| tooltip.transition() | |
| .duration(700) | |
| .style("opacity", 1); | |
| tooltip.html("Student: " +d.code + "<br/> Grade: " + d.grade) | |
| .style("left", (d3.event.pageX + 5) + "px") | |
| .style("top", (d3.event.pageY - 28) + "px"); | |
| }) | |
| .on("mouseout", function(d) { | |
| tooltip.transition() | |
| .duration(500) | |
| .style("opacity", 0); | |
| }); | |
| }); | |
| </script> | |
| </body> |
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