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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 {
border: 1px solid gray;
}
</style>
</head>
<body>
<script>
const margin = { top: 20, right: 30, bottom: 40, left: 40, };
const fullWidth = 560;
const fullHeight = 500;
const width = fullWidth - margin.right - margin.left;
const height = fullHeight - margin.top - margin.bottom;
const svg = d3.select("body").append("svg")
.attr("width", fullWidth)
.attr("height", fullHeight)
.append('g')
.attr('transform', `translate(${margin.left}, ${margin.top})`);
const parseTime = d3.timeParse('%Y/%m/%d');
let yScale, xScale;
d3.json('data.json', (err, data) => {
data.forEach(ticker => {
ticker.values.forEach(d => {
d.date = parseTime(d.date);
d.close = parseFloat(d.close);
})
});
setup(data);
});
function setup(data) {
// build y scale and axis
let min = d3.min(data,
ticker => d3.min(ticker.values,
d => d.close));
let max = d3.max(data,
ticker => d3.max(ticker.values,
d => d.close));
yScale = d3.scaleLinear()
.domain([min, max])
.range([height, 0]);
const yAxis = d3.axisLeft(yScale);
svg.append('g')
.call(yAxis);
// build the x scale and axis
min = d3.min(data,
ticker => d3.min(ticker.values,
d => d.date));
max = d3.max(data,
ticker => d3.max(ticker.values,
d => d.date));
xScale = d3.scaleTime()
.domain([min, max])
.range([0, width]);
const xAxis = d3.axisBottom(xScale)
.ticks(6);
svg.append('g')
.attr('transform', `translate(0, ${height})`)
.call(xAxis);
update(data);
}
function update(data) {
const line = d3.line()
.x(d => xScale(d.date))
.y(d => yScale(d.close))
.curve(d3.curveCatmullRom.alpha(0.5));
const colors = ['#ff9900', '#3369e8'];
svg.selectAll('.line')
.data(data)
.enter()
.append('path')
.attr('class', 'line')
.attr('d', d => line(d.values))
.style('stroke-width', 2)
.style('stroke', (d, i) => colors[i])
.style('fill', 'none');
}
</script>
</body>
https://d3js.org/d3.v4.min.js