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<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; }
svg {
font: 10px sans-serif;
}
.line {
fill: none;
stroke: black;
stroke-width: 2px;
}
</style>
</head>
<body>
<script>
var margin = {top: 20, right: 30, bottom: 20, left: 100},
width = 760 - margin.left - margin.right,
height = 300 - margin.top - margin.bottom;
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 + ")");
var parseDate = d3.timeParse("%b %Y");
var x = d3.scaleTime().range([0, width]),
y = d3.scaleLinear().range([height, 0]),
c = d3.scaleOrdinal(d3.schemeCategory10);
var line = d3.line()
.curve(d3.curveBasis)
.x(function(d) { return x(d.date); })
.y(function(d) { return y(d.price); });
d3.text('dataset.csv', function(error, raw) {
var dsv = d3.dsvFormat(',')
var data = dsv.parse(raw);
// Nest stock values by symbol.
var symbols = d3.nest()
.key(function(d) { return d.symbol; })
.entries(data);
// Parse and caculate some values for each symbols
symbols.forEach(function(s) {
s.values.forEach(function(d) {
d.date = parseDate(d.date);
d.price = +d.price;
});
s.maxPrice = d3.max(s.values, function(d) { return d.price; });
s.sumPrice = d3.sum(s.values, function(d) { return d.price; });
});
x.domain(d3.extent(data, function(d) { return d.date; }));
y.domain([0, d3.max(symbols.map(function(d) { return d.maxPrice; }))])
svg.selectAll(".line").data(symbols).enter()
.append("path")
.attr("class", "line")
.attr("d", function(d) { return line(d.values); })
.style("stroke", function(d) { return c(d.key); });
svg.append("g")
.attr("class", "axis axis--x")
.attr("transform", "translate(0," + height + ")")
.call(d3.axisBottom(x));
svg.append("g")
.attr("class", "axis axis--y")
.call(d3.axisLeft(y).ticks(20));
var legend = svg.selectAll(".legend")
.data(c.domain())
.enter().append("g")
.attr("class", "legend")
.attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });
legend.append("rect")
.attr("x", 30)
.attr("width", 18)
.attr("height", 18)
.style("fill", c);
legend.append("text")
.attr("x", 50)
.attr("y", 9)
.attr("dy", ".35em")
.style("text-anchor", "start")
.text(function(d) { return d; });
});
</script>
</body>
https://d3js.org/d3.v4.min.js