我是 D3 的新手,正在尝试完成圆形元素的过渡和 2 个数据集的线。这条线的过渡很好,但圆圈表现得“疯狂”,我不知道为什么,当它看起来像一个简单的过渡时。
这是代码+使用的两个简单数据集。谢谢!
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body { font: 12px Arial;}
path {
stroke: steelblue;
stroke-width: 2;
fill: none;
}
.axis path,
.axis line {
fill: none;
stroke: grey;
stroke-width: 1;
shape-rendering: crispEdges;
}
.dot {
fill: red;
stroke: black;
}
</style>
<body>
<div id="option">
<input name="updateButton"
type="button"
value="Update"
onclick="updateData()" />
</div>
<!-- load the d3.js library -->
<script type="text/javascript" src="d3/d3.v3.js"></script>
<script>
// Set the dimensions of the canvas / graph
var margin = {top: 30, right: 20, bottom: 30, left: 50},
width = 600 - margin.left - margin.right,
height = 270 - margin.top - margin.bottom;
// Parse the date / time
var parseDate = d3.time.format("%d-%b-%y").parse;
// Set the ranges
var x = d3.time.scale().range([0, width]);
var y = d3.scale.linear().range([height, 0]);
// Define the axes
var xAxis = d3.svg.axis().scale(x)
.orient("bottom").ticks(5);
var yAxis = d3.svg.axis().scale(y)
.orient("left").ticks(5);
// Define the line
var valueline = d3.svg.line()
.x(function(d) { return x(d.date); })
.y(function(d) { return y(d.close); });
// Adds the svg canvas
var svg = d3.select("body")
.append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
// Get the initial data
d3.tsv("data.tsv", function(error, data) {
data.forEach(function(d) {
d.date = parseDate(d.date);
d.close = +d.close;
});
// Scale the range of the data
x.domain(d3.extent(data, function(d) { return d.date; }));
y.domain([0, d3.max(data, function(d) { return d.close; })]);
// Add the valueline path.
svg.append("path")
.attr("class", "line")
.attr("d", valueline(data));
//Add the circles
svg.append("g").attr("class","dot")
.selectAll("circle").data(data).enter().append("circle")
.attr("cx", function(d) { return x(d.date); })
.attr("cy", function(d) { return y(d.close); })
.attr("r",5);
// Add the X Axis
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
// Add the Y Axis
svg.append("g")
.attr("class", "y axis")
.call(yAxis);
});
// ** Update data section (Called from the onclick)
function updateData() {
// Get the data again
d3.tsv("data-alt.tsv", function(error, data) {
data.forEach(function(d) {
d.date = parseDate(d.date);
d.close = +d.close;
});
// Scale the range of the data again
x.domain(d3.extent(data, function(d) { return d.date; }));
y.domain([0, d3.max(data, function(d) { return d.close; })]);
// Make the changes
svg.select(".line").transition() // change the line
.duration(750)
.attr("d", valueline(data));
svg.selectAll("circle").transition() //change the circles
.duration(750)
.attr("cx", function(d) { return x(d.date); })
.attr("cy", function(d) { return y(d.close); });
svg.select(".x.axis").transition() // change the x axis
.duration(750)
.call(xAxis);
svg.select(".y.axis").transition() // change the y axis
.duration(750)
.call(yAxis);
});
}
</script>
</body>
data.tsv
date close
1-May-12 58.13
30-Apr-12 53.98
27-Apr-12 67.00
26-Apr-12 89.70
25-Apr-12 99.00
24-Apr-12 130.28
23-Apr-12 166.70
20-Apr-12 234.98
19-Apr-12 345.44
18-Apr-12 443.34
17-Apr-12 543.70
16-Apr-12 580.13
13-Apr-12 605.23
12-Apr-12 622.77
11-Apr-12 626.20
10-Apr-12 628.44
9-Apr-12 636.23
5-Apr-12 633.68
4-Apr-12 624.31
3-Apr-12 629.32
2-Apr-12 618.63
30-Mar-12 599.55
29-Mar-12 609.86
28-Mar-12 617.62
27-Mar-12 614.48
26-Mar-12 606.98
data-alt.tsv
date close
10-May-12 99.55
8-May-12 76.86
6-May-12 67.62
4-May-12 64.48
2-May-12 60.98
1-May-12 58.13
30-Apr-12 53.98
27-Apr-12 67.00
26-Apr-12 89.70
25-Apr-12 99.00
24-Apr-12 90.28
23-Apr-12 106.70
20-Apr-12 94.98
19-Apr-12 85.44
18-Apr-12 73.34
17-Apr-12 53.70
16-Apr-12 50.13
13-Apr-12 65.23
12-Apr-12 62.77
11-Apr-12 66.20
10-Apr-12 68.44
9-Apr-12 66.23
5-Apr-12 63.68
4-Apr-12 64.31
3-Apr-12 69.32
2-Apr-12 61.63