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<meta charset="utf-8">
<style>
.axis--x path {
display: none;
}
.line {
fill: none;
stroke: steelblue;
stroke-width: 1.5px;
}
</style>
<svg width="960" height="500"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
var svg = d3.select("svg"),
margin = {top: 20, right: 80, bottom: 30, left: 50},
width = svg.attr("width") - margin.left - margin.right,
height = svg.attr("height") - margin.top - margin.bottom,
g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var parseTime = d3.timeParse("%Y%m%d");
var x = d3.scaleTime().range([0, width]),
y = d3.scaleLinear().range([height, 0]),
z = d3.scaleOrdinal(d3.schemeCategory10);
var line = d3.line()
.curve(d3.curveBasis)
.x(function(d) { return x(d.date); })
.y(function(d) { return y(d.temperature); });
// var area = d3.area()
// .curve(d3.curveStepAfter)
// .y0(y(0))
// .y1(function(d) { return y(d.value); });
// var areaPath = g.append("path")
// .attr("clip-path", "url(#clip)")
// .attr("fill", "steelblue");
var yGroup = g.append("g");
var xGroup = g.append("g")
.attr("transform", "translate(0," + height + ")");
var zoom = d3.zoom()
.scaleExtent([1 / 4, 8])
.translateExtent([[-width, -Infinity], [2 * width, Infinity]])
.on("zoom", zoomed);
var zoomRect = svg.append("rect")
.attr("width", width)
.attr("height", height)
.attr("fill", "none")
.attr("pointer-events", "all")
.call(zoom);
g.append("clipPath")
.attr("id", "clip")
.append("rect")
.attr("width", width)
.attr("height", height);
var xAxis = d3.axisBottom(x);
var yAxis = d3.axisLeft(y);
d3.tsv("data.tsv", type, function(error, data) {
if (error) throw error;
var cities = data.columns.slice(1).map(function(id) {
return {
id: id,
values: data.map(function(d) {
return {date: d.date, temperature: d[id]};
})
};
});
console.log(cities);
x.domain(d3.extent(data, function(d) { return d.date; }));
y.domain([
d3.min(cities, function(c) { return d3.min(c.values, function(d) { return d.temperature; }); }),
d3.max(cities, function(c) { return d3.max(c.values, function(d) { return d.temperature; }); })
]);
z.domain(cities.map(function(c) { return c.id; }));
g.append("g")
.attr("class", "axis axis--x")
.attr("transform", "translate(0," + height + ")");
g.append("g")
.attr("class", "axis axis--y")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", "0.71em")
.attr("fill", "#000")
.text("Temperature, ºF");
var city = g.selectAll(".city")
.data(cities)
.enter().append("g")
.attr("class", "city")
.attr("id", function(d) { return d.id.substring(0, 3).toUpperCase();});
city.append("path")
.attr("class", "line")
.attr("clip-path", "url(#clip)")
.attr("d", function(d) { return line(d.values); })
.style("stroke", function(d) { return z(d.id); })
.attr("id", function(d) { return d.id.substring(0, 3).toUpperCase();});
city.append("text")
.datum(function(d) { return {id: d.id, value: d.values[d.values.length - 1]}; })
.attr("transform", function(d) { return "translate(" + x(d.value.date) + "," + y(d.value.temperature) + ")"; })
.attr("x", 3)
.attr("dy", "0.35em")
.style("font", "10px sans-serif")
.text(function(d) { return d.id; });
var cityLabels = d3.selectAll(".city").selectAll("text");
cityLabels.on("click", function(outer) {
var me = d3.select(this);
var on = me.classed("on");
var idSubStr = outer.id.substring(0, 3).toUpperCase();;
if (!on) {
d3.select("path#" + idSubStr)
.transition()
.style("opacity", 0)
.on("end", function(d) {
d3.select(this).style("visibility", "hidden");
});
}
else {
d3.select("path#" + idSubStr)
.style("visibility", "visible")
.transition()
.style("opacity", 1);
}
me.classed("on", !on);
});
cityLabels.on("mouseover", function(outer) {
var me = d3.select(this);
var on = me.classed("on");
var idSubStr = outer.id.substring(0, 3).toUpperCase();
if (!on) {
d3.selectAll(".city").selectAll("path")
.filter(function(d) {
return idSubStr != d.id.substring(0, 3).toUpperCase();;
})
.transition().style("stroke", "lightgray");
}
d3.select("g#" + idSubStr).raise();
});
cityLabels.on("mouseout", function(outer) {
var me = d3.select(this);
var on = me.classed("on");
var idSubStr = outer.id.substring(0, 3).toUpperCase();;
d3.selectAll(".city").selectAll("path")
.filter(function(d) {
return idSubStr != d.id.substring(0, 3).toUpperCase();;
})
.transition().style("stroke", function(d) { return z(d.id); });
});
// var xExtent = d3.extent(data, function(d) { return d.date; });
// zoom.translateExtent([[x(xExtent[0]), -Infinity], [x(xExtent[1]), Infinity]])
// y.domain([0, d3.max(cities, function(c) { return (c.values, function(d){ return d.temperature;}); })]);
// yGroup.call(yAxis).select(".domain").remove();
// areaPath.datum();
zoomRect.call(zoom.transform, d3.zoomIdentity);
});
function type(d, _, columns) {
d.date = parseTime(d.date);
for (var i = 1, n = columns.length, c; i < n; ++i) d[c = columns[i]] = +d[c];
return d;
}
function zoomed() {
var xz = d3.event.transform.rescaleX(x);
xGroup.call(xAxis.scale(xz));
line.x(function(d) { return xz(d.date);})
g.selectAll(".line")
.attr("d", function(d) { return line(d.values); });
// g.selectAll('.line').style("stroke-width", 2/d3.event.transform.k);
// line.x()
// g.selectAll(".line")
// .attr("d", function(d) { return line(d.values); })
// areaPath.attr("d", area.x(function(d) { return xz(d.date); }));
}
</script>
https://d3js.org/d3.v4.min.js