我很努力在D3中堆積面積圖並添加brushing功能。我已經設法生成了大的(焦點)和小的(上下文)軸,並且繪圖看起來很好開始。我的問題是刷牙功能根本不起作用。我一直對此抱有一段時間,但無濟於事,不知道問題出在哪裏。任何幫助將非常感激!在D3中結合堆積面積圖和刷牙
單擊here可以查看該圖的當前狀態。下面的代碼:
<!-- language: lang-js -->
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.tag text {
text-anchor: end;
}
</style>
<body onLoad="updateData()">
<div id="option" style="font-size:14px;">
<form>
Number of tags:<input value="5" id="nTags_select"></input>
<input name="updateButton"
type="button"
value="Update"
onclick="updateData()" />
</form>
</div>
<script src="http://d3js.org/d3.v3.js"></script>
<script>
var margin = {top: 10, right: 10, bottom: 100, left: 40},
margin2 = {top: 430, right: 10, bottom: 20, left: 40},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom,
height2 = 500 - margin2.top - margin2.bottom;
var parseDate = d3.time.format("%Y-%m-%d").parse;
var x = d3.time.scale().range([0, width]),
x2 = d3.time.scale().range([0, width]),
y = d3.scale.linear().range([height, 0]),
y2 = d3.scale.linear().range([height2, 0]);
var color = d3.scale.category20();
var xAxis = d3.svg.axis().scale(x).orient("bottom"),
xAxis2 = d3.svg.axis().scale(x2).orient("bottom"),
yAxis = d3.svg.axis().scale(y).orient("left");
var brush = d3.svg.brush()
.x(x2)
.on("brush", brushed);
var area = d3.svg.area()
.interpolate("basis")
.x(function(d) { return x(d.date); })
.y0(function(d) { return y(d.y0); })
.y1(function(d) { return y(d.y0 + d.y); });
var area2 = d3.svg.area()
.interpolate("basis")
.x(function(d) { return x2(d.date); })
.y0(function(d) { return y2(d.y0); })
.y1(function(d) { return y2(d.y0 + d.y); });
var stack = d3.layout.stack()
.values(function(d) { return d.values; });
var oRequest = new XMLHttpRequest();
var sURL = "data100.tsv";
oRequest.open("GET",sURL,false);
oRequest.setRequestHeader("User-Agent",navigator.userAgent);
oRequest.send(null)
var data = oRequest.responseText;
var data = d3.tsv.parse(data);
data.forEach(function(d) {
d.date = parseDate(d.date);
});
color.domain(d3.keys(data[0]).filter(function(key) { return key !== "date"; }));
var allTags = stack(color.domain().map(function(name) {
return {
name: name,
values: data.map(function(d) {
return {date: d.date, y: +d[name]};
})
};
}));
function updateData(){
var nTags = document.getElementById('nTags_select').value;
tags=allTags.slice(0,nTags);
x.domain(d3.extent(data, function(d) { return d.date; }));
y.domain([0,d3.max(tags, function(d) { return d3.max(d.values, function (d) { return d.y + d.y0; }); })]);
x2.domain(x.domain());
y2.domain(y.domain());
d3.select("svg").remove();
var svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
svg.append("defs").append("clipPath")
.attr("id", "clip")
.append("rect")
.attr("width", width)
.attr("height", height);
var focus = svg.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var context = svg.append("g")
.attr("transform", "translate(" + margin2.left + "," + margin2.top + ")");
focus.selectAll('path')
.data(tags)
.enter()
.append('path')
.attr('clip-path','url(#clip)')
.attr("d", function(d) { return area(d.values); })
.attr('class','focus')
.style("fill", function(d) { return color(d.name); });
focus.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
focus.append("g")
.attr("class", "y axis")
.call(yAxis);
context.selectAll('path')
.data(tags)
.enter()
.append('path')
.attr('class','context')
.attr("d", function(d) { return area2(d.values); })
.style("fill", function(d) { return color(d.name); });
context.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height2 + ")")
.call(xAxis2);
context.append("g")
.attr("class", "x brush")
.call(brush)
.selectAll("rect")
.attr("y", -6)
.attr("height", height2 + 7);
focus.append("text")
.datum(function(d) { return {name: d.name, value: d.values[d.values.length - 1]}; })
.attr("transform", function(d) { return "translate(" + x(d.value.date) + "," + y(d.value.y0 + d.value.y/2) + ")"; })
.attr("x", -6)
.attr("dy", "-.35em")
.text(function(d) { return d.name; });
};
function brushed() {
x.domain(brush.empty() ? x2.domain() : brush.extent());
focus.selectAll("path.focus").attr("d", area);
focus.select(".x.axis").call(xAxis);
}
</script>
謝謝!這非常有幫助。我最初是在Mike的示例之後對代碼進行建模的,但是當嘗試添加更新功能時,這給我帶來了問題。我最終設置了原樣,所以我可以加載數據一次,然後選擇要使用表單元素進行繪圖的子集,清除繪圖並重繪。目前還不清楚如何用通常的「d3.tsv(」blah.tsv「,函數(error,data){....};」格式來做到這一點。「你會把d3.tsv函數放在」updateData ()「功能?再次感謝。 – moustachio 2013-04-09 13:31:17
Nevermind!工作正常! – moustachio 2013-04-09 14:49:14
@moustachio,你可以發佈工作版嗎? – 2013-09-21 01:23:54