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March 31, 2018 10:53
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area chart
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| license: mit |
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <style> | |
| .area { | |
| fill: teal; | |
| stroke: none; | |
| } | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| url="https://raw.githubusercontent.com/FreeCodeCamp/ProjectReferenceData/master/GDP-data.json"; | |
| //chart margins and range of w and hs of the levels inside chart | |
| var margin = {top: 20, right: 20, bottom: 70, left: 40}, | |
| w = 800 - margin.left - margin.right, | |
| h = 500 - margin.top - margin.bottom; | |
| var parseDate = d3.timeParse("%Y-%m-%d"); | |
| var svg = d3 | |
| .select("body") | |
| .append("svg") | |
| .attr("w", w + margin.left + margin.right) | |
| .attr("h", h + margin.top + margin.bottom) | |
| .append("g") | |
| .attr("transform", | |
| "translate(" + margin.left + "," + margin.top + ")"); | |
| d3.json(url, function(data) { | |
| resultData = data.data; | |
| resultData.forEach(function(d){ | |
| d[0] = (parseDate(d[0])); | |
| }); | |
| //axis | |
| var xScale= d3 | |
| .scaleTime() | |
| .domain(d3.extent(resultData, d=>d[0])) | |
| .range([0, w]); | |
| var yScale = d3 | |
| .scaleLinear() | |
| .domain(d3.extent(resultData, d=>d[1])) | |
| .range([h,0]); | |
| //add area | |
| area = d3.area() | |
| .x(d=>xScale(d[0])) | |
| .y0(function() { return yScale.range()[0]; }) | |
| //this is important, it's not 0, it's like h | |
| .y1(d=>yScale(d[1])); | |
| svg | |
| .append("path") | |
| .datum(resultData) | |
| .attr("class", "area") | |
| .attr("d", area); | |
| svg.append("g") | |
| .attr("class", "axis") | |
| .attr("transform", "translate(2," + (h+2) + ")") | |
| .call(d3.axisBottom(xScale) | |
| .ticks(10))//.tickFormat(d3.timeFormat("%Y-%b-%d"))) | |
| .selectAll("text") | |
| .style("text-anchor", "end") | |
| .attr("dx", "-.8em") | |
| .attr("dy", ".15em") | |
| .attr("transform", "rotate(-65)"); | |
| //.tickFormat(d3.timeFormat("%Y"))); | |
| svg.append("g") | |
| .attr("class", "axis") | |
| .call(d3.axisLeft(yScale) | |
| .ticks(10)) | |
| .append("text") | |
| .attr("y", 6) | |
| .attr("dy", ".71em") | |
| .style("text-anchor", "end") | |
| .text("GDP"); }); | |
| </script> | |
| </body> | |
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