129 lines
4.0 KiB
JavaScript
129 lines
4.0 KiB
JavaScript
var TestChart = {
|
|
init: function(){
|
|
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;
|
|
}
|
|
|
|
}, //ENDOF TestChart()
|
|
} |