我的数据点和 scaleBand y 轴上的值没有对齐。我无法正确对齐它们，当我阅读文档时，看到默认情况下对齐为 0.5，这就是为什么我的数据点绘制在轴的两点之间。但是我试图覆盖对齐方式，我将对齐方式设置为 0，但似乎没有任何变化。
以下是我的代码。
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge"/>
<title>D3 v4 - linechart</title>
<style>
#graph {
width: 900px;
height: 500px;
}
.tick line {
stroke-dasharray: 2 2 ;
stroke: #ccc;
}
.y path{
fill: none;
stroke: none;
}
</style>
</head>
<body>
<div id="graph"></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.1.1/d3.min.js"></script>
<script>
!(function(){
"use strict"
var width,height
var chartWidth, chartHeight
var margin
var svg = d3.select("#graph").append("svg")
var axisLayer = svg.append("g").classed("axisLayer", true)
var chartLayer = svg.append("g").classed("chartLayer", true)
var xScale = d3.scaleLinear()
var yScale = d3.scaleBand()
var align = 0
//d3.tsv("data1.tsv", cast, main)
d3.json("http://localhost/d32.json",cast)
//データの方変換
function cast(data) {
console.log("got it");
data.forEach(function(data) {
console.log(data.Letter);
data.Letter = data.Letter;
data.Freq = +data.Freq;
});
main(data);
}
function main(data) {
console.log("in main");
setSize(data)
drawAxis()
drawChart(data)
}
function setSize(data) {
width = document.querySelector("#graph").clientWidth
height = document.querySelector("#graph").clientHeight
margin = {top:40, left:100, bottom:40, right:0 }
chartWidth = width - (margin.left+margin.right+8)
chartHeight = height - (margin.top+margin.bottom)
svg.attr("width", width).attr("height", height)
axisLayer.attr("width", width).attr("height", height)
chartLayer
.attr("width", chartWidth)
.attr("height", chartHeight)
.attr("transform", "translate("+[margin.left, margin.top]+")")
xScale.domain([0, d3.max(data, function(d) { return d.Freq; })]).range([0,chartWidth])
yScale.domain(data.map(function(d) { return d.Letter; })).range([chartHeight, 0]).align(1)
}
function drawChart(data) {
console.log("in drawChart");
var t = d3.transition()
.duration(8000)
.ease(d3.easeLinear)
.on("start", function(d){ console.log("transiton start") })
.on("end", function(d){ console.log("transiton end") })
var lineGen = d3.line()
.x(function(d) { return xScale(d.Freq) })
.y(function(d) { return yScale(d.Letter) })
.curve(d3.curveStepAfter)
var line = chartLayer.selectAll(".line")
.data([data])
line.enter().append("path").classed("line", true)
.merge(line)
.attr("d", lineGen)
.attr("fill", "none")
.attr("stroke", "blue")
.attr("stroke-width","2px")
.attr("stroke-dasharray", function(d){ return this.getTotalLength() })
.attr("stroke-dashoffset", function(d){ return this.getTotalLength() })
chartLayer.selectAll(".line").transition(t)
.attr("stroke-dashoffset", 0)
chartLayer.selectAll("circle").classed("circle",true)
.data(data)
.enter().append("circle")
.attr("class", "circle")
.attr("fill","none")
.attr("stroke","black")
.attr("cx", function(d) { return xScale(d.Freq); })
.attr("cy", function(d) { return yScale(d.Letter); })
.attr("r", 4);
chartLayer.selectAll(".logo").transition(t)
.attr("stroke-dashoffset", 0)
}
function drawAxis(){
var yAxis = d3.axisLeft(yScale)
.tickSizeInner(-chartWidth)
axisLayer.append("g")
.attr("transform", "translate("+[margin.left, margin.top]+")")
.attr("class", "axis y")
.call(yAxis);
var xAxis = d3.axisBottom(xScale)
axisLayer.append("g")
.attr("class", "axis x")
.attr("transform", "translate("+[margin.left, chartHeight+margin.top]+")")
.call(xAxis);
}
}());
</script>
</body>
</html>
输出如下所示:
最佳答案
在这种情况下，波段刻度是错误的工具。主要原因是波段尺度具有相关的带宽。
您可以调整 band scale 的 paddingInner 和 paddingOuter 值以获得预期的结果。但是，最简单的解决方案是改用点刻度。 Point scales :
...are a variant of band scales with the bandwidth fixed to zero. (emphasis mine)
所以，应该是:
var yScale = d3.scalePoint()
关于javascript - scaleBand 轴中的数据点和刻度未对齐，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/47173160/