### Example21 - join by key
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forked from jjelosua's block: d3intro_exercise_data_w_key_solved
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March 11, 2016 10:02
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d3intro_exercise_data_w_key_solved
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Intro d3js examples</title> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script> | |
| <style> | |
| body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; } | |
| p:hover { | |
| cursor: pointer; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <h1>Intro d3js - exercise binding with key</h1> | |
| <p id="update">Click here to update data</p> | |
| <!--<p> previous paragraph</p>--> | |
| <script type="text/javascript"> | |
| //Width and height | |
| var active2015 = true; | |
| var w = 600; | |
| var h = 250; | |
| var offset = 10; | |
| var data2015 = [ { product: "camisas", value: 5 }, | |
| { product: "pantalones", value: 10 }]; | |
| var data2016 = [{product: "camisas", value: 10}, | |
| {product: "camisetas", value:8}, | |
| {product: "ropa interior", value:10}]; | |
| var data = active2015 ? data2015 : data2016; | |
| var xScale = d3.scale.ordinal() | |
| .domain(d3.range(data.length)) | |
| .rangeRoundBands([0, w], 0.05); | |
| var yScale = d3.scale.linear() | |
| .domain([0, d3.max(data, function(d) { return d.value; })]) | |
| .range([h, 0]); | |
| //Define key function, to be used when binding data | |
| var key_func = function(d) { | |
| return d.product; | |
| }; | |
| //Create SVG element | |
| var svg = d3.select("body") | |
| .append("svg") | |
| .attr("width", w) | |
| .attr("height", h); | |
| //Create bars | |
| svg.selectAll("rect") | |
| .data(data2015, key_func) | |
| .enter() | |
| .append("rect") | |
| .attr("x", function(d, i) { | |
| return xScale(i); | |
| }) | |
| .attr("y", function(d) { | |
| return yScale(d.value); | |
| }) | |
| .attr("width", xScale.rangeBand()) | |
| .attr("height", function(d) { | |
| return h - yScale(d.value); | |
| }) | |
| .attr("fill", function(d) { | |
| return "rgb(0, 0, " + (d.value * 10) + ")"; | |
| }); | |
| //Create labels | |
| svg.selectAll("text") | |
| .data(data, key_func) | |
| .enter() | |
| .append("text") | |
| .text(function(d) { | |
| return d.product + ": " + d.value; | |
| }) | |
| .attr("text-anchor", "middle") | |
| .attr("x", function(d, i) { | |
| return xScale(i) + xScale.rangeBand() / 2; | |
| }) | |
| .attr("y", function(d) { | |
| return yScale(d.value) + offset; | |
| }) | |
| .attr("font-family", "sans-serif") | |
| .attr("font-size", "11px") | |
| .attr("fill", "white"); | |
| //On click, update with new data | |
| d3.select("p#update") | |
| .on("click", function() { | |
| // Toggle dataset | |
| active2015 = !active2015; | |
| var data = active2015 ? data2015 : data2016; | |
| //Update scale domains | |
| xScale.domain(d3.range(data.length)); | |
| yScale.domain([0, d3.max(data, function(d) { return d.value; })]); | |
| //Select… | |
| var bars = svg.selectAll("rect") | |
| .data(data, key_func); | |
| //Enter… | |
| bars.enter() | |
| .append("rect") | |
| .attr("x", w) | |
| .attr("y", function(d) { | |
| return yScale(d.value); | |
| }) | |
| .attr("width", xScale.rangeBand()) | |
| .attr("height", function(d) { | |
| return h - yScale(d.value); | |
| }) | |
| .attr("fill", function(d) { | |
| return "rgb(0, 0, " + (d.value * 10) + ")"; | |
| }); | |
| //Update… | |
| bars.transition() | |
| .duration(500) | |
| .attr("x", function(d, i) { | |
| return xScale(i); | |
| }) | |
| .attr("y", function(d) { | |
| return yScale(d.value); | |
| }) | |
| .attr("width", xScale.rangeBand()) | |
| .attr("height", function(d) { | |
| return h - yScale(d.value); | |
| }); | |
| //Exit… | |
| bars.exit() | |
| .transition() | |
| .duration(500) | |
| .style("opacity", 0) | |
| .remove(); | |
| //Update all labels | |
| //Select… | |
| var labels = svg.selectAll("text") | |
| .data(data, key_func); | |
| //Enter… | |
| labels.enter() | |
| .append("text") | |
| .text(function(d) { | |
| return d.product + ": " + d.value; | |
| }) | |
| .attr("text-anchor", "middle") | |
| .attr("x", w) | |
| .attr("y", function(d) { | |
| return yScale(d.value) + offset; | |
| }) | |
| .attr("font-family", "sans-serif") | |
| .attr("font-size", "11px") | |
| .attr("fill", "white"); | |
| //Update… | |
| labels.transition() | |
| .duration(500) | |
| .attr("x", function(d, i) { | |
| return xScale(i) + xScale.rangeBand() / 2; | |
| }) | |
| .attr("y", function(d) { | |
| return yScale(d.value) + offset; | |
| }) | |
| .text(function(d) { | |
| return d.product + ": " + d.value; | |
| }); | |
| //Exit… | |
| labels.exit() | |
| .transition() | |
| .duration(500) | |
| .style("opacity", 0) | |
| .remove(); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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