Skip to content

Instantly share code, notes, and snippets.

@d3noob
Last active September 24, 2022 21:04
Show Gist options
  • Save d3noob/15e4f2a49d0d25468e76ab6717cd95e7 to your computer and use it in GitHub Desktop.
Save d3noob/15e4f2a49d0d25468e76ab6717cd95e7 to your computer and use it in GitHub Desktop.
Simple Line Graph v7
license: mit

This is a simple line graph written with d3.js v7 and based on @mbostock's example here.

This simple graph is designed to be used as a starting point for further development as part of documenting an update to the book D3 Tips and Tricks to version 7 of d3.js.

date close
26-Mar-12 606.98
27-Mar-12 614.48
28-Mar-12 617.62
29-Mar-12 609.86
30-Mar-12 599.55
2-Apr-12 618.63
3-Apr-12 629.32
4-Apr-12 624.31
5-Apr-12 633.68
9-Apr-12 636.23
10-Apr-12 628.44
11-Apr-12 626.20
12-Apr-12 622.77
13-Apr-12 605.23
16-Apr-12 580.13
17-Apr-12 543.70
18-Apr-12 443.34
19-Apr-12 345.44
20-Apr-12 234.98
23-Apr-12 166.70
24-Apr-12 130.28
25-Apr-12 99.00
26-Apr-12 89.70
27-Apr-12 67.00
30-Apr-12 53.98
1-May-12 58.13
date close
1-May-12 58.13
30-Apr-12 53.98
27-Apr-12 67.00
26-Apr-12 89.70
25-Apr-12 99.00
24-Apr-12 130.28
23-Apr-12 166.70
20-Apr-12 234.98
19-Apr-12 345.44
18-Apr-12 443.34
17-Apr-12 543.70
16-Apr-12 580.13
13-Apr-12 605.23
12-Apr-12 622.77
11-Apr-12 626.20
10-Apr-12 628.44
9-Apr-12 636.23
5-Apr-12 633.68
4-Apr-12 624.31
3-Apr-12 629.32
2-Apr-12 618.63
30-Mar-12 599.55
29-Mar-12 609.86
28-Mar-12 617.62
27-Mar-12 614.48
26-Mar-12 606.98
<!DOCTYPE html>
<meta charset="utf-8">
<style> /* set the CSS */
.line {
fill: none;
stroke: steelblue;
stroke-width: 2px;
}
</style>
<body>
<!-- load the d3.js library -->
<script src="https://d3js.org/d3.v7.min.js"></script>
<script>
// set the dimensions and margins of the graph
var margin = {top: 20, right: 20, bottom: 30, left: 50},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
// parse the date / time
var parseTime = d3.timeParse("%d-%b-%y");
// set the ranges
var x = d3.scaleTime().range([0, width]);
var y = d3.scaleLinear().range([height, 0]);
// define the line
var valueline = d3.line()
.x(function(d) { return x(d.date); })
.y(function(d) { return y(d.close); });
// append the svg obgect to the body of the page
// appends a 'group' element to 'svg'
// moves the 'group' element to the top left margin
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("data.csv").then(function(data) {
// format the data
data.forEach(function(d) {
d.date = parseTime(d.date);
d.close = +d.close;
});
// 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.close; })]);
// Add the valueline path.
svg.append("path")
.data([data])
.attr("class", "line")
.attr("d", valueline);
// Add the x Axis
svg.append("g")
.attr("transform", "translate(0," + height + ")")
.call(d3.axisBottom(x));
// Add the y Axis
svg.append("g")
.call(d3.axisLeft(y));
});
</script>
</body>
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment