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original.html
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original.html
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<!DOCTYPE html>
<html>
<meta charset="utf-8" />
<style>
.area {
fill: steelblue;
clip-path: url(#clip);
}
.zoom {
cursor: move;
fill: none;
pointer-events: all;
}
</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: 20, bottom: 110, left: 40 },
margin2 = { top: 430, right: 20, bottom: 30, left: 40 },
width = +svg.attr("width") - margin.left - margin.right,
height = +svg.attr("height") - margin.top - margin.bottom,
height2 = +svg.attr("height") - margin2.top - margin2.bottom;
var parseDate = d3.timeParse("%b %Y");
var x = d3.scaleTime().range([0, width]),
x2 = d3.scaleTime().range([0, width]),
y = d3.scaleLinear().range([height, 0]),
y2 = d3.scaleLinear().range([height2, 0]);
var xAxis = d3.axisBottom(x),
xAxis2 = d3.axisBottom(x2),
yAxis = d3.axisLeft(y);
var brush = d3
.brushX()
.extent([[0, 0], [width, height2]])
.on("brush end", brushed);
var zoom = d3
.zoom()
.scaleExtent([1, Infinity])
.translateExtent([[0, 0], [width, height]])
.extent([[0, 0], [width, height]])
.on("zoom", zoomed);
var area = d3
.area()
.curve(d3.curveMonotoneX)
.x(function(d) {
return x(d.date);
})
.y0(height)
.y1(function(d) {
return y(d.price);
});
var area2 = d3
.area()
.curve(d3.curveMonotoneX)
.x(function(d) {
return x2(d.date);
})
.y0(height2)
.y1(function(d) {
return y2(d.price);
});
svg.append("defs")
.append("clipPath")
.attr("id", "clip")
.append("rect")
.attr("width", width)
.attr("height", height);
var focus = svg
.append("g")
.attr("class", "focus")
.attr(
"transform",
"translate(" + margin.left + "," + margin.top + ")"
);
var context = svg
.append("g")
.attr("class", "context")
.attr(
"transform",
"translate(" + margin2.left + "," + margin2.top + ")"
);
d3.csv("sp500.csv", type, function(error, data) {
if (error) throw error;
x.domain(
d3.extent(data, function(d) {
return d.date;
})
);
y.domain([
0,
d3.max(data, function(d) {
return d.price;
})
]);
x2.domain(x.domain());
y2.domain(y.domain());
focus
.append("path")
.datum(data)
.attr("class", "area")
.attr("d", area);
focus
.append("g")
.attr("class", "axis axis--x")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
focus
.append("g")
.attr("class", "axis axis--y")
.call(yAxis);
context
.append("path")
.datum(data)
.attr("class", "area")
.attr("d", area2);
context
.append("g")
.attr("class", "axis axis--x")
.attr("transform", "translate(0," + height2 + ")")
.call(xAxis2);
context
.append("g")
.attr("class", "brush")
.call(brush)
.call(brush.move, x.range());
svg.append("rect")
.attr("class", "zoom")
.attr("width", width)
.attr("height", height)
.attr(
"transform",
"translate(" + margin.left + "," + margin.top + ")"
)
.call(zoom);
});
function brushed() {
if (d3.event.sourceEvent && d3.event.sourceEvent.type === "zoom")
return; // ignore brush-by-zoom
var s = d3.event.selection || x2.range();
x.domain(s.map(x2.invert, x2));
focus.select(".area").attr("d", area);
focus.select(".axis--x").call(xAxis);
svg.select(".zoom").call(
zoom.transform,
d3.zoomIdentity.scale(width / (s[1] - s[0])).translate(-s[0], 0)
);
}
function zoomed() {
if (d3.event.sourceEvent && d3.event.sourceEvent.type === "brush")
return; // ignore zoom-by-brush
var t = d3.event.transform;
x.domain(t.rescaleX(x2).domain());
focus.select(".area").attr("d", area);
focus.select(".axis--x").call(xAxis);
context
.select(".brush")
.call(brush.move, x.range().map(t.invertX, t));
}
function type(d) {
d.date = parseDate(d.date);
d.price = +d.price;
return d;
}
</script>
</html>