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romsson/.block

Last active December 2, 2023 05:39
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interactive line chart
Raw
.block
license: mit
Raw
dataset.json
[{"id" : 1, "name": "A", "value": 10, "date": "2016-01"},
{"id" : 2, "name": "B", "value": 30, "date": "2016-02"},
{"id" : 3, "name": "C", "value": 20, "date": "2016-03"},
{"id" : 4, "name": "D", "value": 40, "date": "2016-04"},
{"id" : 5, "name": "E", "value": 50, "date": "2016-05"},
{"id" : 6, "name": "F", "value": 20, "date": "2016-06"},
{"id" : 7, "name": "G", "value": 10, "date": "2016-07"},
{"id" : 8, "name": "H", "value": 80, "date": "2016-08"},
{"id" : 9, "name": "I", "value": 30, "date": "2016-09"},
{"id" : 10, "name": "J", "value": 70, "date": "2016-10"},
{"id" : 11, "name": "K", "value": 90, "date": "2016-11"},
{"id" : 12, "name": "L", "value": 40, "date": "2016-12"}
]
Raw
index.html
<!DOCTYPE html>
<head>
<meta charset="utf-8">
<script src="https://d3js.org/d3.v4.js"></script>
<style>
body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
.line {
fill: none;
stroke: black;
stroke-width: 1.5px;
}
</style>
</head>
<body>
<script>
// Margin setup
var margin = {top: 20, right: 30, bottom: 20, left: 100},
width = 760 - margin.left - margin.right,
height = 300 - margin.top - margin.bottom;
// Basic SVG canvas
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 + ")");
// http://bl.ocks.org/zanarmstrong/raw/05c1e95bf7aa16c4768e/
var parseDate = d3.timeParse("%Y-%m");
var displayDate = d3.timeFormat("%b %y");
var displayValue = d3.format(",.0f");
// Temporal scale
var x = d3.scaleTime()
.range([0, width]);
// Linear scale
var y = d3.scaleLinear()
.range([height, height - 200]);
var line = d3.line()
.x(function(d) { return x(d.date); })
.y(function(d) { return y(d.value); });
var g = svg.append("g")
.attr("transform", "translate(10, 0)");
d3.json("dataset.json", function(data) {
// Pre-processing
// {"id" : 1, "name": "A", "value": 10, "date": "2016-01"}
data.forEach(function(d) {
d.value = +d.value;
d["date"] = parseDate(d["date"]);
});
x.domain(d3.extent(data, function(d) { return d.date; }));
y.domain([0, d3.max(data, function(d) { return d.value; })]);
g.selectAll(".value").data([data[data.length -1]]).enter()
.append("text")
.attr("class", "value")
.attr("y", function(d) { return y(d.value); })
.attr("x", width - 20)
.style("font-size", 20)
.attr("transform", "translate(10, 20)")
.style("font-family", "monospace")
.text(function(d, i) { return d.value; });
g.selectAll("circle").data(data).enter()
.append("circle")
.attr("cx", function(d) { return x(d.date); })
.attr("cy", function(d) { return y(d.value); })
.attr("r", function(d, i) { return 5; })
.attr("id", function(d) { return d.id; })
.style("fill", "#fcb0b5")
.on("mouseover", function(d){
d3.select(this).transition().duration(200).style("fill", "#d30715");
g.selectAll("#tooltip").data([d]).enter().append("text")
.attr("id", "tooltip")
.text(function(d, i) { return d.value; })
.attr("y", function(d) {return y(d.value) - 12})
.attr("x", function(d) { return x(d.date); })
g.selectAll("#tooltip_path").data([d]).enter().append("line")
.attr("id", "tooltip_path")
.attr("class", "line")
.attr("d", line)
.attr("x1", function(d) {return x(d.date)})
.attr("x2", function(d) {return x(d.date)})
.attr("y1", height)
.attr("y2", function(d) {return y(d.value)})
.attr("stroke", "black")
.style("stroke-dasharray", ("3, 3"));
})
.on("mouseout", function(d) {
d3.select(this).transition().duration(500).style("fill", "#fcb0b5");
g.selectAll("#tooltip").remove();
g.selectAll("#tooltip_path").remove();
});
g.selectAll("path").data([data]).enter().append("path")
.attr("class", "line")
.attr("d", line);
svg.append("g")
.attr("class", "axis axis--x")
.attr("transform", "translate(0," + height + ")")
.call(d3.axisBottom(x));
});
</script>
</body>
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