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forked from romsson's block: bar chart axis color scale
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January 25, 2019 05:33
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line chart with stocks.csv dataset
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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> | |
| body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| // 1. Create the SVG | |
| var svg = d3.select("body") | |
| .append("svg") | |
| .attr("width", 800) | |
| .attr("height", 600) | |
| // Scales | |
| var x = d3.scaleBand() | |
| .paddingInner(0.05) | |
| .range([0, 500]); | |
| var y = d3.scaleLinear() | |
| .range([0, 100]); | |
| var color = d3.scaleOrdinal(d3.schemeCategory20) | |
| // 2. Load stocks data | |
| // 0: {symbol: "MSFT", date: "Jan 2000", price: "39.81", value: 39.81} | |
| d3.csv('https://raw.githubusercontent.com/LyonDataViz/MOS5.5-Dataviz/master/data/stocks.csv', function(error, raw) { | |
| var symbols = []; | |
| var data = [] | |
| // Data pre-processing | |
| raw.forEach(function(d, i) { | |
| if(data[d.symbol] === "undefined") { | |
| data[d.symbol] = []; | |
| } | |
| d.value = +d.price; | |
| data[d.symbol].push(d); | |
| symbols[d.symbol] = true | |
| }) | |
| symbols = d3.keys(symbols); | |
| var xAxis = d3.axisBottom() | |
| .scale(x); | |
| var yAxis = d3.axisLeft() | |
| .scale(y); | |
| // Line generator | |
| var line = d3.line().curve(d3.curveCardinal) | |
| .x(function(d, i) { return x(i); }) | |
| .y(function(d) { return 300 -y(d); }) | |
| svg.selectAll(".line").data([data]).enter() | |
| .append("path") | |
| .attr("class", "line") | |
| .attr("d", function(d) { return line(d); }) | |
| .attr("stroke", "black") | |
| svg.append('g') | |
| .attr('transform', 'translate(15,' + 300 + ')') | |
| .attr('class', 'x axis') | |
| .call(xAxis); | |
| svg.append('g') | |
| .attr('transform', 'translate(15,' + 200 + ')') | |
| .attr('class', 'y axis') | |
| .call(yAxis); | |
| }); | |
| </script> | |
| </body> |
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