尊敬的Stack溢出社区，
我是d3中真正的初学者。自一个星期以来，我一直在苦苦挣扎，并决定要求。我也做了很多研究，并尝试了许多东西，但仍然无法解决。我需要根据json文件中的数据更新条形图。 y轴应根据字段“ L”而变化。我可以实现更新机制，而x轴没有任何问题，但是y轴不变，并且保持不变。我尝试使用.y以及.y轴来引用它，还试图更改类名，但是y轴仍然保持不变。我不知道我的代码有什么问题。
[编辑]当将鼠标悬停在条形上时，我可以弄清楚颜色改变功能，只是更新y轴，我仍然无法进一步。
我希望任何人都可以帮助我，让我陷入困境，并且不知道我做错了什么。
非常感谢您的帮助。
整个代码应包含在一个html文件中。
这是一个比以前更干净的版本。
`<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script type="text/javascript" src="https://d3js.org/d3.v5.min.js"></script>
<style>
.container {
float: left;
}
</style>
</head>
<body>
<h1>KBO Rankings</h1>
<div id="drop1"></div>
<div id="drop2"></div>
<div id="drop3"></div>
<div id="table" class="container">
</div>
<div id="chart1" class="container">
<svg id="firstSvg"></svg>
</div>
<div id="chart2" class="container">
<svg id="secondSvg"></svg>
</div>
<script>
// entries of second dropdown list
let drop2data = ["WR", "DG"];
let drop3data = ["W", "D", "L"];
let tablehdata = ["rank", "team", "W", "D", "L", "win_rate", "diff_game"];
let dropDownL1 = d3.select("#drop1")
.append('select')
.attr("id","yearSelector");
let dropDownL2 = d3.select("#drop2")
.append('select')
.selectAll('option')
.data(drop2data).enter()
.append('option')
.text(function(d){
return d;
});
let dropDownL3 = d3.select("#drop3")
.append('select')
.selectAll('option')
.data(drop3data)
.enter()
.append('option')
.text(function(d){
return d;
});
// creating table
var table = d3.select("#table").append("table")
.attr("width",500)
.attr("height",300);
var thead = table.append("thead");
var tbody = table.append("tbody");
var jsondata = d3.json("data.json").then(function(data){
for(var i = 0; i< data.length;i++) {
let options1 = dropDownL1.selectAll('option')
.data(data).enter()
.append('option')
.text(function(d){
console.log(d.year);
for(var j = 0;j < d.rankings.length;j++) {
console.log(d.rankings[j].team);
}
return d.year;
}).attr("indexVal",function(d,i){
return i;
});
}
thead.append("tr")
.selectAll("th")
.data(tablehdata)
.enter()
.append("th")
.text(function(column){
return column;
});
tbody.selectAll("tr").remove();
rows = tbody.selectAll("tr")
.data(data[0].rankings)
.enter()
.append("tr")
.on("mouseover", function(d){
d3.select(this)
.style("font-weight", "bold");
})
.on('mouseout', function(d){
d3.select(this)
.style("font-weight","normal");
});
cells = rows.selectAll("td")
.data(function(row){
return tablehdata.map(function(column){
return {
column: column, value: row[column]
}
});
})
.enter()
.append("td")
.html(function(d){
return d.value;
});
cells.exit().remove();
// baseBTable = tabulate(data[33].rankings,["rank", "team", "W", "D", "L", "win_rate", "diff_game"]);
});
// getting option of select
// 1st axes 1st chart
var margin = {top: 30, right: 30, bottom: 30, left: 50},
width = 500 - margin.left - margin.right,
height = 320 - margin.top - margin.bottom;
// 1st chart
var xAxisData = [1985, 1990, 1995, 2000, 2005, 2010, 2015];
const svg1 = d3.select("#chart1").select("#firstSvg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
const yScale1 = d3.scaleLinear()
.range([height,0])
.domain([0.2,0.7]);
const chart1 = svg1.append("g")
.call(d3.axisLeft(yScale1));
const xScale1 = d3.scaleBand()
.range([0,width])
.domain(xAxisData)
.padding(0.2);
chart1.append("g")
.attr("transform","translate(0, "+height+")")
.call(d3.axisBottom(xScale1));
// 2nd chart
var colorScale = d3.scaleOrdinal(d3.schemePaired);
const svg2 = d3.select("#chart2").select("#secondSvg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var xScale = d3.scaleBand()
.rangeRound([0,width])
.padding(0.1);
var yScale = d3.scaleLinear()
.range([height,0]);
var chart2;
var xAxisCall = d3.axisBottom();
var yAxisCall = d3.axisLeft();
d3.json("data.json").then(function(data){
//for(var i = 0;i<data[0].rankings.length;i++){
//domainX.push(data[0].rankings[i].team);
//}
xScale.domain(data[0].rankings.map(function(d){
return d.team;
}));
yScale.domain([0,d3.max(data[0].rankings, function(d){
return d.L;
})]);
xAxisCall.scale(xScale);
yAxisCall.scale(yScale);
chart2 = svg2.append("g")
.attr("class", "y axis")
.call(yAxisCall);
chart2.append("g")
.attr("class","x axis")
.attr("transform", "translate(0, " + height +")")
.call(xAxisCall);
chart2.selectAll(".bar")
.data(data[0].rankings)
.enter().append("rect")
.attr("class","bar")
.attr("x",function(d){
return xScale(d.team);
})
.attr("y", function(d){
return yScale(d.L);
})
.attr("width",xScale.bandwidth())
.attr("height", function(d){
return height -yScale(d.L);
})
.style("fill", function(d,i){
return colorScale(i);
})
.attr("id",function(d,i){
return i;
})
.on("mouseover", function(d){
d3.select(this)
.style("fill","brown");
})
.on("mouseout",function(d,i){
d3.select(this).style("fill",function(){
return ""+colorScale(this.id)+"";
});
});
});
function change(){
var columns = ["rank", "team", "W", "D", "L", "win_rate", "diff_game"];
var rows, cells;
selected = d3.select("#yearSelector").node().value;
d3.json("data.json").then(function(data){
for(var i=0;i<data.length;i++){
if(selected == data[i].year){
tbody.selectAll("tr").remove();
rows = tbody.selectAll("tr")
.data(data[i].rankings)
.enter()
.append("tr")
.on("mouseover", function(d){
d3.select(this)
.style("font-weight", "bold");
})
.on('mouseout', function(d){
d3.select(this)
.style("font-weight","normal");
});
cells = rows.selectAll("td")
.data(function(row){
return columns.map(function(column){
return {
column: column, value: row[column]
}
});
})
.enter()
.append("td")
.attr('class', 'enter')
.transition();
cells.text(function(d){
return d.value;
});
// problem to update y axis
yScale.domain([0,d3.max(data[i].rankings, function(d){
console.log("Wert ist "+d.L);
return d.L;
})]);
chart2.select('.y')
.call(yAxisCall);
xScale.domain(data[i].rankings.map(function(d){
return d.team;
}));
chart2.selectAll(".x")
.call(xAxisCall);
var bars = chart2.selectAll(".bar")
.remove()
.exit()
.data((data[i].rankings));
bars.enter()
.append("rect")
.attr("class","bar")
.attr("x",function(d){
return xScale(d.team);
})
.attr("y", function(d){
return yScale(d.L);
})
.attr("width",xScale.bandwidth())
.attr("height", function(d){
return height -yScale(d.L);
})
.style("fill", function(d,i){
return colorScale(i);
})
.attr("id",function(d,i){
return i;
})
.on("mouseover", function(d){
d3.select(this)
.style("fill","brown");
})
.on("mouseout",function(d,i){
d3.select(this).style("fill",function(){
return ""+colorScale(this.id)+"";
});
});
bars.transition()
.attr("y", function(d,i) { return yScale(d); })
.attr("height", function(d,i) { return height - yScale(d); });
bars.exit().remove();
}
}
});
};
dropDownL1.on("change",change);
</script>
</body>
</html>
`
这是json文件：https://ufile.io/8qnft