【发布时间】：2021-10-04 19:21:39
【问题描述】：
我创建了一个条形图 我想要的只是如何获得最大栏的亮点
问题 问题是我必须突出显示最大值的栏 我使用 d3v6 创建图表
下面是我用来创建栏的当前代码
<!DOCTYPE html>
<meta charset="utf-8">
<!-- Load d3.js -->
<script src="https://d3js.org/d3.v6.js"></script>
<!-- Create a div where the graph will take place -->
<div id="my_dataviz"></div>
<script>
// set the dimensions and margins of the graph
const margin = {top: 30, right: 30, bottom: 70, left: 60},
width = 460 - margin.left - margin.right,
height = 400 - margin.top - margin.bottom;
// append the svg object to the body of the page
const svg = d3.select("#my_dataviz")
.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})`);
// Parse the Data
//d3.csv("https://raw.githubusercontent.com/holtzy/data_to_viz/master/Example_dataset/7_OneCatOneNum_header.csv").then( function(data) {
// X axis
final_data=
{
"total":10,
"plotting_data":[
{slider: "01", Value: "3"},
{slider: "02", Value: "5"},
{slider: "03", Value: "6"},
{slider: "04", Value: "4"},
{slider: "05", Value: "5"},
]
}
data=final_data["plotting_data"]
console.log("data:-",data)
const x = d3.scaleBand()
.range([ 0, width ])
.domain(data.map(d => d.slider))
.padding(0.2);
svg.append("g")
.attr("transform", `translate(0, ${height})`)
.call(d3.axisBottom(x).tickSize(0))
.selectAll("text")
.attr("transform", "translate(0,0)rotate(0)") //rotate(0) it can be used to tilt the text
.style("text-anchor", "center");//here we can specify the start end and center values
// Add Y axis
const y = d3.scaleLinear()
.domain([0, final_data['total']])
.range([ height, 0]);
svg.append("g")
.call(d3.axisLeft(y).tickSize(0));
const rx =5;
const ry =5;
// Bars
var bars = svg.selectAll("mybar")
.data(data)
.enter()
.append("g")
bars.append("path")
.attr("x", d => x(d.slider))
.attr("y", d => y(d.Value))
.attr("width", x.bandwidth())
.attr("height", d => height - y(d.Value))
.attr("fill", "#056DFF")
.attr(
"d",
item => `
M${x(item.slider)},${y(item.Value) + ry}
a${rx},${ry} 0 0 1 ${rx},${-ry}
h${x.bandwidth() - 2 * rx}
a${rx},${ry} 0 0 1 ${rx},${ry}
v${height - y(item.Value) - ry}
h${-x.bandwidth()}Z
`
)
bars.append("text")
.attr("class", "label")
//y position of the label is halfway down the bar
.attr("y", function (d) {
if (d.Value>=5/100*final_data['total']){
return y(d.Value)+10;
}
else
{return y(d.Value)};
})
//x position is 3 pixels to the right of the bar
.attr("x", d => x(d.slider) +x.bandwidth()/2)
.style("font-size", function (d) {
return 10;
})
.style("font-family","sans-serif")
.style('fill', 'white')
.text(function (d) {
return d.Value;
})
.style("text-anchor", "middle");
svg.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 0 - margin.left)
.attr("x",0 - (height / 2))
.attr("dy", "1em")
.style("text-anchor", "middle")
.text("No of resources");
// text label for the x axis
svg.append("text")
.attr("transform",
"translate(" + (width/2) + " ," +
(height + margin.top + 20) + ")")
.style("text-anchor", "middle")
.text("Slider Value")
.style('fill', 'black');
</script>
</body>
任何帮助或指导都会有很大帮助 对于下面的问题评论有任何疑问
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标签： javascript html css d3.js