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line chart (temporal data)
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license: mit |
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[{"id" : 1, "name": "A", "value": 10, "date": "2016-01"}, | |
{"id" : 2, "name": "B", "value": 30, "date": "2016-02"}, | |
{"id" : 3, "name": "C", "value": 20, "date": "2016-03"} , | |
{"id" : 3, "name": "C", "value": 20, "date": "2016-04"} ] |
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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> | |
// Feel free to change or delete any of the code you see in this editor! | |
var margin = {top: 20, right: 10, bottom: 20, left: 10}; | |
var width = 480 - margin.left - margin.right, | |
height = 250 - margin.top - margin.bottom; | |
var svg = d3.select("body").append("svg") | |
.attr("width", width) | |
.attr("height", height) | |
// var data = d3.range(10).map(Math.random) | |
d3.json("dataset.json", function(data) { | |
var parseDate = d3.timeParse("%Y-%m") | |
var displayDate = d3.timeFormat("%b %y") | |
data.forEach(function(d) { | |
d.value = +d.value; | |
d.date = parseDate(d.date); | |
}); | |
var x = d3.scaleTime() | |
.domain(d3.extent(data, function(d) { return d.date; })) | |
.range([margin.left, width + margin.left]) | |
var y = d3.scaleLinear() | |
.domain([d3.min(data, function(d) { return d.value; }), | |
d3.max(data, function(d) { return d.value; })]) | |
.range([margin.top, height + margin.top]) | |
var line = d3.line() | |
.curve(d3.curveMonotoneX) | |
.x(function(d, i) { return x(d.date); }) | |
.y(function(d, i) { return height-y(d.value); }) | |
svg.selectAll("path").data([data]).enter() | |
.append("path") | |
.style("fill", "none") | |
.style("stroke", "black") | |
.attr("d", line); | |
svg.selectAll("text").data(data).enter() | |
.append('text') | |
.attr("x", function(d, i) { return x(d.date); }) | |
.attr("y", function(d, i) { return height; }) | |
.text(function(d) { return displayDate(d.date)}) | |
}) | |
</script> | |
</body> |
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