我正在改编 Mike Bostock 的优秀作品 stacked bar chart example .一些条形的 Y 值似乎没有显示在正确的位置。这是一个 jsFiddle (下面的完整代码)。
我认为相关的片段在这里:
layer.selectAll("rect")
.data(function(d) { return d.values; })
.enter().append("rect")
.attr("fill-opacity", .5)
.attr("stroke", "#000")
.attr("width", x.rangeBand())
.attr("x", function(d) { return x(d.x); })
.attr("y", function(d) { return y(d.y0 + d.y); })
.attr("height", function(d) { return y(d.y0) - y(d.y0 + d.y); });
完整示例:
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
</style>
<p>This is a test</p>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var data = [
{
"key": "Key_2",
"values": [
{"x": "Cols # 21", "y": 70},
{"x": "Cols # 9", "y": 39},
{"x": "Cols # 8", "y": 96},
{"x": "Cols # 43", "y": 95},
{"x": "Cols # 16", "y": 21},
{"x": "Cols # 49", "y": 24}
]
},
{
"key": "Key_1",
"values": [
{"x": "Cols # 21", "y": 93},
{"x": "Cols # 9", "y": 73},
{"x": "Cols # 8", "y": 94},
{"x": "Cols # 16", "y": 80},
{"x": "Cols # 43", "y": 56},
{"x": "Cols # 49", "y": 83}
]
},
{
"key": "Key_0",
"values": [
{"x": "Cols # 21", "y": 38},
{"x": "Cols # 9", "y": 88},
{"x": "Cols # 8", "y": 7},
{"x": "Cols # 43", "y": 38},
{"x": "Cols # 16", "y": 88},
{"x": "Cols # 49", "y": 77}
]
}
]
var margin = {top: 40, right: 10, bottom: 20, left: 50},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom,
keys = data[0].values.map(function(item){return item.x }),
stack = d3.layout.stack().values(function(d){ return d.values;}),
layers = stack(data),
yMax = d3.max(layers, function(layer) { return d3.max(layer.values, function(d) { return d.y0 + d.y; }); })
//Calulate totals for each x value in the domain
var totals = {};
data.forEach(function(series){
series.values.forEach(function(item){
totals[item.x] = (totals[item.x] || 0 ) + item.y
})
})
var x = d3.scale.ordinal()
.domain(keys)
.rangeRoundBands([0, width], .08);
var y = d3.scale.linear()
.domain([0, yMax])
.range([height, 0]);
var color = d3.scale.linear()
.domain([0, data.length - 1])
.range(["#f00", "#00f"]);
var yAxis = d3.svg.axis()
.scale(y)
.tickSize(0)
.tickPadding(6)
.orient("left");
var xAxis = d3.svg.axis()
.scale(x)
.tickSize(0)
.tickPadding(6)
.orient("bottom");
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 + ")");
var layer = svg.selectAll(".layer")
.data(layers)
.enter().append("g")
.attr("class", "layer")
.style("fill", function(d, i) { return color(i); });
layer.selectAll("rect")
.data(function(d) { return d.values; })
.enter().append("rect")
.attr("fill-opacity", .5)
.attr("stroke", "#000")
.attr("width", x.rangeBand())
.attr("x", function(d) { return x(d.x); })
.attr("y", function(d) { return y(d.y0 + d.y); })
.attr("height", function(d) { return y(d.y0) - y(d.y0 + d.y); });
layer.selectAll("text")
.data(keys)
.enter().append("text")
.text( function(d){return d + ': '+ totals[d];})
.attr('fill', '#000')
.style('font-size', 15)
.attr("x", function(d){ return x(d) + 25})
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(yAxis);
</script>
最佳答案
它似乎是 an issue with the data not being properly sorted :
比较:
var data = [
{
"key": "Key_2",
"values": [
{"x": "Cols # 21", "y": 70},
{"x": "Cols # 9", "y": 39},
{"x": "Cols # 8", "y": 96},
{"x": "Cols # 43", "y": 95},
{"x": "Cols # 16", "y": 21},
{"x": "Cols # 49", "y": 24} ...
和:
var data = [
{
"key": "Key_2",
"values": [
{"x": "Cols # 21", "y": 70},
{"x": "Cols # 9", "y": 39},
{"x": "Cols # 8", "y": 96},
{"x": "Cols # 16", "y": 21},
{"x": "Cols # 43", "y": 95},
{"x": "Cols # 49", "y": 24} ...
关于javascript - 使用 d3.js 堆栈布局的堆积条形图；条形部分并不总是在正确的位置，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/17711387/