[英]D3.js ordinal multi-series line chart: Nan at path
Please apologies if this seems like a duplicate D3 question. 如果这似乎是重复的D3问题,请深表歉意。 I've spent 2 days trying to figure out how to do this.
我花了2天的时间来弄清楚该如何做。
I'm trying to create a multi-line chart with the x-axis as an ordinal scale, and the y axis as a normal linear scale. 我正在尝试创建一个多折线图,其中x轴为有序刻度,y轴为法线线性刻度。
Data is loaded from external JSON: 数据是从外部JSON加载的:
[
{
"arbeitsgang":"A1",
"y":5,
"z":4
},
{
"arbeitsgang":"A2",
"y":6,
"z":11
},
{
"arbeitsgang":"A3",
"y":4,
"z":45
}
]
And here's where I've written for trying to create the chart: 这是我为尝试创建图表而写的内容:
<!DOCTYPE html>
<meta charset="utf-8">
<style> /* set the CSS */
body { font: 12px Arial;}
path {
stroke: steelblue;
stroke-width: 2;
fill: none;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.line {
fill: none;
stroke: steelblue;
stroke-width: 1.5px;
}
</style>
<body>
<!-- load the d3.js library -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.js"> </script>
<script>
var margin = {
top: 20,
right: 20,
bottom: 20,
left: 50
},
width = 600 - margin.left - margin.right,
height = 300 - margin.top - margin.bottom;
var x = d3.scale.ordinal().rangeRoundBands([0, width],0.1);
var y = d3.scale.linear().rangeRound([height, 0]);
var ordinalScale = d3.scale.ordinal();
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(y)
.orient("left");
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 line = d3.svg.line()
.x(function(d) { return x(d.arbeitsgang); })
.y(function(d) { return y(d.koordinaten); });
d3.json("Arbeitsgang.json", function(error, data) {
ordinalScale.domain(d3.keys(data[0]).filter(function(key) { return key !== "arbeitsgang"; }));
data.forEach(function(d) {
d.arbeitsgang = d.arbeitsgang;
d.y = +d.y;
d.z = +d.z;
});
var arbeitsgange = ordinalScale.domain().map(function(name) {
return {
name: name,
values: data.map(function (d) {
return {arbeitsgang: d.arbeitsgang, koordinaten: +d[name]};
})
}
});
x.domain(d3.extent(data, function(d) { return d.arbeitsgang; }));
y.domain([
d3.min(arbeitsgange, function(c) { return d3.min(c.values, function(v) { return v.koordinaten; }); }),
d3.max(arbeitsgange, function(c) { return d3.max(c.values, function(v) { return v.koordinaten; }); })
]);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(yAxis);
var graphen = svg.selectAll(".graphen")
.data(arbeitsgange)
.enter().append("g")
.attr("class", "graphen");
graphen.forEach(function(d) {
console.log(d);
});
graphen.append("path")
.attr("class", "line")
.attr("d", function(d) { return line(d.values)});
});
</script>
</body>
So there seems to be 2 mistakes: 1. x-axis only got 2 ticks ( A1, A3) but A2 is missing 2. there is no graph visible. 因此,似乎有2个错误:1. x轴仅获得2个刻度(A1,A3),但缺少A2 2.没有可见的图形。 With html dom profiler you can see that there are 2 graphs:
使用html dom profiler,您可以看到有2个图形:
<path class="line" d="M26,254LNaN,247L278,260"/>
<path class="line" d="M26,260LNaN,216L278,0"/>
As you can see there is something with NaN inside. 如您所见,其中包含NaN。 Maybe it is an error while parsing.
解析时可能是错误。 I simply don't know.
我根本不知道。
Thanks for your help 谢谢你的帮助
While we are using 'rangeRoundBands' for x axis scale var x = d3.scale.ordinal().rangeRoundBands([0, width],0.1);
当我们对x轴比例使用'rangeRoundBands'时,
var x = d3.scale.ordinal().rangeRoundBands([0, width],0.1);
, ,
we need to set domain with all the points, I did like this 我们需要设置所有要点的域,我确实是这样
x.domain(['A1','A2','A3']/*d3.extent(data, function(d) { return d.arbeitsgang; })*/);
Go through with this link and the working fiddle . 通过此链接和有效的小提琴进行检查 。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.