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mbostock/.block

Last active January 24, 2018 15:53
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Waterfall
Raw
.block
license: gpl-3.0
Raw
README.md

A waterfall chart.

Raw
data.tsv
region value
N. America 47
Europe 22
Asia 12
Australia 7
Middle East -3
Africa -26
S. America -69
Raw
index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>
svg {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.rect {
fill: #333;
}
.rect--negative {
fill: brown;
}
.label {
fill: white;
font-size: 12px;
text-anchor: end;
}
.label-change {
font-weight: bold;
}
.label-value {
fill-opacity: 0.8;
}
.label--negative {
text-anchor: start;
}
</style>
<svg width="960" height="500"></svg>
<script src="//d3js.org/d3.v4.0.0-alpha.9.min.js"></script>
<script>
var formatChange = d3.format("+d"),
formatValue = d3.format("d");
var svg = d3.select("svg");
var margin = {top: 20, right: 40, bottom: 40, left: 80},
width = +svg.attr("width") - margin.left - margin.right,
height = +svg.attr("height") - margin.top - margin.bottom;
var g = svg.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
d3.requestTsv("data.tsv", function(d) {
d.value = +d.value;
return d;
}, function(error, data) {
if (error) throw error;
// Compute a simple “stack” by iterating over the data.
data.reduce(function(v, d) { return d.value1 = (d.value0 = v) + d.value; }, 0);
var x = d3.scaleLinear()
.domain(d3.extent(data, function(d) { return d.value1; })).nice()
.range([0, width]);
var y = d3.scaleBand()
.domain(data.map(function(d) { return d.region; }))
.rangeRound([0, height])
.padding(0.1);
g.append("g")
.attr("transform", "translate(0," + height + ")")
.attr("class", "axis axis--x")
.call(d3.axisBottom(x));
g.append("g").selectAll("rect")
.data(data)
.enter().append("rect")
.attr("class", function(d) { return "rect rect--" + (d.value0 < d.value1 ? "positive" : "negative"); })
.attr("y", function(d) { return y(d.region); })
.attr("x", function(d) { return x(d.value0 < d.value1 ? d.value0 : d.value1); })
.attr("width", function(d) { return d.value0 < d.value1 ? x(d.value1) - x(d.value0) : x(d.value0) - x(d.value1); })
.attr("height", y.bandwidth());
var label = g.append("g").selectAll("text")
.data(data)
.enter().append("text")
.attr("class", function(d) { return "label label--" + (d.value0 < d.value1 ? "positive" : "negative"); })
.attr("y", function(d) { return y(d.region) + y.bandwidth() / 2; });
label.append("tspan")
.attr("class", "label-change")
.attr("dy", "-.2em")
.text(function(d) { return formatChange(d.value1 - d.value0); });
label.append("tspan")
.attr("class", "label-value")
.attr("dy", "1.1em")
.text(function(d) { return formatValue(d.value1); });
label.selectAll("tspan")
.attr("x", function(d) { return x(d.value1) + (d.value0 < d.value1 ? -6 : 6); });
g.append("g")
.attr("class", "axis axis--y")
.attr("transform", "translate(" + x(0) + ",0)")
.call(d3.axisLeft(y).tickSize(0).tickPadding(x(0) + 6));
});
</script>
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