|
<!DOCTYPE html> |
|
<meta charset="utf-8"> |
|
<style> /* set the CSS */ |
|
|
|
body { font: 12px Arial;} |
|
|
|
path { |
|
stroke: steelblue; |
|
stroke-width: 2; |
|
fill: none; |
|
} |
|
|
|
.axis path, |
|
.axis line { |
|
fill: none; |
|
stroke: grey; |
|
stroke-width: 1; |
|
shape-rendering: crispEdges; |
|
} |
|
|
|
.legend { |
|
font-size: 16px; |
|
font-weight: bold; |
|
text-anchor: middle; |
|
} |
|
|
|
</style> |
|
<body> |
|
|
|
<!-- load the d3.js library --> |
|
<script src="https://d3js.org/d3.v4.min.js"></script> |
|
|
|
<script> |
|
|
|
// Set the dimensions of the canvas / graph |
|
var margin = {top: 30, right: 20, bottom: 70, left: 50}, |
|
width = 600 - margin.left - margin.right, |
|
height = 300 - margin.top - margin.bottom; |
|
|
|
// Parse the date / time |
|
var parseDate = d3.timeParse("%b %Y"); |
|
|
|
// Set the ranges |
|
var x = d3.scaleTime().range([0, width]); |
|
var y = d3.scaleLinear().range([height, 0]); |
|
|
|
// Define the line |
|
var priceline = d3.line() |
|
.x(function(d) { return x(d.date); }) |
|
.y(function(d) { return y(d.price); }); |
|
|
|
// Adds the svg canvas |
|
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 + ")"); |
|
|
|
// Get the data |
|
d3.csv("stocks.csv", function(error, data) { |
|
data.forEach(function(d) { |
|
d.date = parseDate(d.date); |
|
d.price = +d.price; |
|
}); |
|
|
|
// Scale the range of the data |
|
x.domain(d3.extent(data, function(d) { return d.date; })); |
|
y.domain([0, d3.max(data, function(d) { return d.price; })]); |
|
|
|
// Nest the entries by symbol |
|
var dataNest = d3.nest() |
|
.key(function(d) {return d.symbol;}) |
|
.entries(data); |
|
|
|
// set the colour scale |
|
var color = d3.scaleOrdinal(d3.schemeCategory10); |
|
|
|
legendSpace = width/dataNest.length; // spacing for the legend |
|
|
|
// Loop through each symbol / key |
|
dataNest.forEach(function(d,i) { |
|
svg.append("path") |
|
.attr("class", "line") |
|
.style("stroke", function() { // Add the colours dynamically |
|
return d.color = color(d.key); }) |
|
.attr("id", 'tag'+d.key.replace(/\s+/g, '')) // assign an ID |
|
.attr("d", priceline(d.values)); |
|
|
|
// Add the Legend |
|
svg.append("text") |
|
.attr("x", (legendSpace/2)+i*legendSpace) // space legend |
|
.attr("y", height + (margin.bottom/2)+ 5) |
|
.attr("class", "legend") // style the legend |
|
.style("fill", function() { // Add the colours dynamically |
|
return d.color = color(d.key); }) |
|
.on("click", function(){ |
|
// Determine if current line is visible |
|
var active = d.active ? false : true, |
|
newOpacity = active ? 0 : 1; |
|
// Hide or show the elements based on the ID |
|
d3.select("#tag"+d.key.replace(/\s+/g, '')) |
|
.transition().duration(100) |
|
.style("opacity", newOpacity); |
|
// Update whether or not the elements are active |
|
d.active = active; |
|
}) |
|
.text(d.key); |
|
|
|
}); |
|
|
|
// Add the X Axis |
|
svg.append("g") |
|
.attr("class", "axis") |
|
.attr("transform", "translate(0," + height + ")") |
|
.call(d3.axisBottom(x)); |
|
|
|
// Add the Y Axis |
|
svg.append("g") |
|
.attr("class", "axis") |
|
.call(d3.axisLeft(y)); |
|
|
|
}); |
|
|
|
</script> |
|
</body> |
