A demonstration of area.defined.
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Area with Missing Data
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license: gpl-3.0 |
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
body { | |
font: 10px sans-serif; | |
} | |
.axis path, | |
.axis line { | |
fill: none; | |
stroke: #000; | |
shape-rendering: crispEdges; | |
} | |
.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.v4.0.0-alpha.15.min.js"></script> | |
<script> | |
var data = d3.range(40).map(function(i) { | |
return {x: i / 39, y: (Math.sin(i / 3) + 2) / 4}; | |
}); | |
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 area = d3.area() | |
.defined(line.defined()) | |
.x(line.x()) | |
.y1(line.y()) | |
.y0(y(0)); | |
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("path") | |
.attr("class", "area") | |
.attr("d", area); | |
svg.append("g") | |
.attr("class", "x axis") | |
.attr("transform", "translate(0," + height + ")") | |
.call(d3.axisBottom(x)); | |
svg.append("g") | |
.attr("class", "y axis") | |
.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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