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@mbostock mbostock/.block
Last active Jul 5, 2019

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Line with Missing Data
license: gpl-3.0
redirect: https://observablehq.com/@d3/line-with-missing-data
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.area {
fill: lightsteelblue;
}
.line {
fill: none;
stroke: steelblue;
stroke-width: 1.5px;
}
.dot {
fill: white;
stroke: steelblue;
stroke-width: 1.5px;
}
</style>
<body>
<script src="//d3js.org/d3.v4.min.js"></script>
<script>
var data = d3.range(40).map(function(i) {
return i % 5 ? {x: i / 39, y: (Math.sin(i / 3) + 2) / 4} : null;
});
var margin = {top: 40, right: 40, bottom: 40, left: 40},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var x = d3.scaleLinear()
.range([0, width]);
var y = d3.scaleLinear()
.range([height, 0]);
var line = d3.line()
.defined(function(d) { return d; })
.x(function(d) { return x(d.x); })
.y(function(d) { return y(d.y); });
var svg = d3.select("body").append("svg")
.datum(data)
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
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));
svg.append("path")
.attr("class", "line")
.attr("d", line);
svg.selectAll(".dot")
.data(data.filter(function(d) { return d; }))
.enter().append("circle")
.attr("class", "dot")
.attr("cx", line.x())
.attr("cy", line.y())
.attr("r", 3.5);
</script>
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