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forked from romsson's block: loading multiple stock data from dataset
forked from jeremygnfsk's block: Small multiples
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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: 8, right: 10, bottom: 2, left: 10},
width = 960 - margin.left - margin.right,
height = 69 - margin.top - margin.bottom;
var parseDate = d3.timeParse("%b %Y");
var x = d3.scaleTime().range([0, width]),
y = d3.scaleLinear().range([height, 0]),
color = d3.scaleOrdinal(d3.schemeCategory10);
var area = d3.area()
.x(function(d) { return x(d.date); })
.y0(height)
.y1(function(d) { return y(d.price); });
var line = d3.line()
.x(function(d) { return x(d.date); })
.y(function(d) { return y(d.price); });
d3.csv("dataset.csv", type, function(error, data) {
// Nest data by symbol.
var symbols = d3.nest()
.key(function(d) { return d.symbol; })
.entries(data);
// Compute the maximum price per symbol, needed for the y-domain.
symbols.forEach(function(s) {
s.maxPrice = d3.max(s.values, function(d) { return d.price; });
});
// Compute the minimum and maximum date across symbols.
// We assume values are sorted by date.
x.domain([
d3.min(symbols, function(s) { return s.values[0].date; }),
d3.max(symbols, function(s) { return s.values[s.values.length - 1].date; })
]);
// Add an SVG element for each symbol, with the desired dimensions and margin.
var svg = d3.select("body").selectAll("svg")
.data(symbols)
.enter().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 + ")");
// Add the area path elements. Note: the y-domain is set per element.
svg.append("path")
.attr("class", "area")
.attr("d", function(d) { y.domain([0, d.maxPrice]); return area(d.values); })
.style("fill", function(d) { return color(d.key);});
// Add a small label for the symbol name.
svg.append("text")
.attr("x", width - 6)
.attr("y", height - 6)
.style("text-anchor", "end")
.text(function(d) { return d.key; });
});
function type(d) {
d.price = +d.price;
d.date = parseDate(d.date);
return d;
}
</script>
</body>
https://d3js.org/d3.v4.min.js