https://codepen.io/juanf03/pen/YGyyjY?editors=1111
我正在使用 D3.js 建模条形图，并且数据并未像想象中那样由条形图表示......这将是正确的图表
这是我的图表:
由于某种原因，我的秤似乎不正确...我用 lodash 按 GDP 对数据进行了排序，这在控制台上似乎是正确的。 json 包含当年的 GDP 和年份本身。有人发现我的体重秤设置有问题吗？这是我的 .js 文件。
$('document').ready(function() {
var url = 'https://raw.githubusercontent.com/FreeCodeCamp/ProjectReferenceData/master/GDP-data.json';
var months = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
//build svg with class chart
var width=800, height=600, padding=50;
var canvas=d3.select('#holder').append('svg').attr('id','chart').style({"width":width,"height":height}).attr('transform','translate(' + padding + ',' + padding + ')');;
d3.json(url, function( data ) {
let datausa=_.sortBy(data.data,1),barWidth=Math.ceil(width/data.data.length);
console.log(datausa);
var svg = d3.select("svg");
console.log(datausa);
d3.select(".notes").append("text").text(data.description);
var maxMinYearSet=d3.extent(datausa,function(d){
return d[0].substring(0,4);
});
//build x scale, year
var xScale=d3.time.scale()
.range([0,width])
.domain(maxMinYearSet);
//build y scale, gross dom prod
var maxY=d3.max(datausa,function(d){
return d[1];
});
var yScale=d3.scale.linear()
.domain([0,maxY])
.range([height-padding,0]);
//set up the x axis
var xAxis = d3.svg.axis().scale(xScale)
.orient("bottom")
.ticks(20);
//set up the y axis
var yAxis = d3.svg.axis().scale(yScale)
.orient("left")
.ticks(20);
// Add the X Axis
canvas.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
canvas.append("g")
.attr("class", "y axis")
.call(yAxis);
var rect= canvas.selectAll('rect.rectangle')
.data(datausa)
.enter()
.append('rect').attr('class','rectangle');
rect.attr('x',function(d,i){
return i*barWidth;
});
rect.attr('y',function(d){
return 0;
});
rect.attr('height',function(d){
return yScale(d[1]);
});
rect.attr('width',function(d){
return 20;
});
rect.on("mouseover", function(d){
console.log(d3.select(this));
});
rect.on("mouseleave",function(d){
});
});
});
这是我的 html 文件:
<div id="container" class="container">
<div id="title">
US Gross Domestic Product by quarter
</id>
<div id="holder">
</div>
<div class="notes">
</div>
</div>
和我的CSS:
#holder{
border: 1px black solid;
}
.rectangle{
fill:#0097A7;
margin:10px;
}
svg{
/*-webkit-transform: rotate(90deg);
-moz-transform: rotate(90deg);
-o-transform: rotate(90deg);
-ms-transform: rotate(90deg);
transform: rotate(180deg);
transform:scaleY(-1);
-moz-transform: scaleY(-1);*/
}
图表也是颠倒的，有没有办法在不使用 css 转换的情况下纠正它？.....谢谢!
最佳答案
您的高度和y计算已关闭。如果您引用venerable bar chart example ，应该是:
rect.attr('y', function(d) {
return yScale(d[1]);
});
rect.attr('height', function(d) {
return height - yScale(d[1]);
});
运行代码:
<!DOCTYPE html>
<html>
<head>
<script data-require="d3@3.5.3" data-semver="3.5.3" src="//cdnjs.cloudflare.com/ajax/libs/d3/3.5.3/d3.js"></script>
<script data-require="lodash.js@4.16.2" data-semver="4.16.2" src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/4.16.2/lodash.js"></script>
<style>
#holder {
border: 1px black solid;
}
.rectangle {
fill: #0097A7;
margin: 10px;
}
svg {
/*-webkit-transform: rotate(90deg);
-moz-transform: rotate(90deg);
-o-transform: rotate(90deg);
-ms-transform: rotate(90deg);
transform: rotate(180deg);
transform:scaleY(-1);
-moz-transform: scaleY(-1);*/
}
</style>
</head>
<body>
<div id="container" class="container">
<div id="title">
US Gross Domestic Product by quarter
</div>
<div id="holder"></div>
<div class="notes"></div>
</div>
<script>
var url = 'https://raw.githubusercontent.com/FreeCodeCamp/ProjectReferenceData/master/GDP-data.json';
var months = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
//build svg with class chart
var width = 800,
height = 600,
padding = 50;
var canvas = d3.select('#holder').append('svg').attr('id', 'chart').style({
"width": width,
"height": height
}).attr('transform', 'translate(' + padding + ',' + padding + ')');;
d3.json(url, function(data) {
let datausa = _.sortBy(data.data, 1),
barWidth = Math.ceil(width / data.data.length);
console.log(datausa);
var svg = d3.select("svg");
console.log(datausa);
d3.select(".notes").append("text").text(data.description);
var maxMinYearSet = d3.extent(datausa, function(d) {
return d[0].substring(0, 4);
});
//build x scale, year
var xScale = d3.time.scale()
.range([0, width])
.domain(maxMinYearSet);
//build y scale, gross dom prod
var maxY = d3.max(datausa, function(d) {
return d[1];
});
var yScale = d3.scale.linear()
.domain([0, maxY])
.range([height - padding, 0]);
//set up the x axis
var xAxis = d3.svg.axis().scale(xScale)
.orient("bottom")
.ticks(20);
//set up the y axis
var yAxis = d3.svg.axis().scale(yScale)
.orient("left")
.ticks(20);
// Add the X Axis
canvas.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
canvas.append("g")
.attr("class", "y axis")
.call(yAxis);
var rect = canvas.selectAll('rect.rectangle')
.data(datausa)
.enter()
.append('rect').attr('class', 'rectangle');
rect.attr('x', function(d, i) {
return i * barWidth;
});
rect.attr('y', function(d) {
return yScale(d[1]);
});
rect.attr('height', function(d) {
return height - yScale(d[1]);
});
rect.attr('width', function(d) {
return 20;
});
rect.on("mouseover", function(d) {
console.log(d3.select(this));
});
rect.on("mouseleave", function(d) {
});
});
</script>
</body>
</html>关于javascript - D3.js:条形图中的条形，比例尺未正确建模数据，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39799960/