Built with blockbuilder.org
forked from romsson's block: simple line chart from dataset
license: mit |
Built with blockbuilder.org
forked from romsson's block: simple line chart from dataset
[{"name": "A", "value": 10, "date": "2016-01"}, | |
{"name": "B", "value": 30, "date": "2016-02"}, | |
{"name": "C", "value": 20, "date": "2016-03"}, | |
{"name": "D", "value": 40, "date": "2016-04"}, | |
{"name": "E", "value": 50, "date": "2016-05"}, | |
{"name": "F", "value": 20, "date": "2016-06"}, | |
{"name": "G", "value": 10, "date": "2016-07"} | |
] |
<!DOCTYPE html> | |
<head> | |
<meta charset="utf-8"> | |
<script src="https://d3js.org/d3.v4.min.js"></script> | |
<style> | |
.line { | |
fill: none; | |
stroke: black; | |
stroke-width: 1.5px; | |
} | |
</style> | |
</head> | |
<body> | |
<script> | |
var svg = d3.select("body").append("svg") | |
.attr("width", 960) | |
.attr("height", 500); | |
var width = 800; | |
var height = 400; | |
// See formats http://bl.ocks.org/zanarmstrong/raw/05c1e95bf7aa16c4768e/ | |
// Data sample {"name": "G", "value": 10, "date": "2016-07"} | |
var parseDate = d3.timeParse("%Y-%m"); | |
var displayDate = d3.timeFormat("%b %y"); | |
var displayValue = d3.format(",.0f"); | |
// Ordinal 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(50, 0)") | |
d3.json("dataset.json", function(error, data) { | |
if (error) throw error; | |
// Pre-processing | |
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; })]); | |
svg.selectAll(".label").data(data).enter() | |
.append("text") | |
.attr("class", "label") | |
.text(function(d, i) { return displayDate(d.date); }) | |
.attr("y", 420) | |
.attr("x", function(d) { return x(d.date); }) | |
.style("font-size", 10) | |
.style("font-family", "monospace"); | |
// Display last value | |
g.selectAll(".value").data([data[data.length -1]]).enter() | |
.append("text") | |
.text(function(d, i) { return displayValue(d.value); }) | |
.attr("class", "value") | |
.attr("y", function(d) { return y(d.value); }) | |
.attr("x", width + 10) | |
.style("font-size", 20) | |
.style("font-family", "monospace"); | |
// Display circle on every peek of the line | |
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") | |
// Add interaction to peeks when the mouse move in | |
.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")); | |
}) | |
//Remove interaction from peeks when the mouse move out | |
.on("mouseout", function(d) { | |
d3.select(this).transition().duration(500).style("fill", "#fcb0b5"); | |
g.selectAll("#tooltip").remove(); | |
g.selectAll("#tooltip_path").remove(); | |
}); | |
// end display | |
g.selectAll(".line").data([data]).enter().append("path") | |
.attr("class", "line") | |
.attr("d", line); | |
}); | |
</script> | |
</body> |