Javascript “如何在现场运行代码并获得所需输出”;可观察的EHQ“;
我是新的d3.js。我试图在这里运行代码。为了运行此代码,我将该代码放在index.js文件中Javascript “如何在现场运行代码并获得所需输出”;可观察的EHQ“;,javascript,d3.js,svg,observablehq,Javascript,D3.js,Svg,Observablehq,我是新的d3.js。我试图在这里运行代码。为了运行此代码,我将该代码放在index.js文件中 d3 = require("d3@5") height = 500 margin = ({top: 10, right: 10, bottom: 20, left: 40}) data = Object.assign(d3.csvParse(await FileAttachment("data.csv").text(), d3.autoType), {y: "Population"}) groupKe
d3 = require("d3@5")
height = 500
margin = ({top: 10, right: 10, bottom: 20, left: 40})
data = Object.assign(d3.csvParse(await FileAttachment("data.csv").text(), d3.autoType), {y: "Population"})
groupKey = data.columns[0]
keys = data.columns.slice(1)
x0 = d3.scaleBand()
.domain(data.map(d => d[groupKey]))
.rangeRound([margin.left, width - margin.right])
.paddingInner(0.1)
x1 = d3.scaleBand()
.domain(keys)
.rangeRound([0, x0.bandwidth()])
.padding(0.05)
y = d3.scaleLinear()
.domain([0, d3.max(data, d => d3.max(keys, key => d[key]))]).nice()
.rangeRound([height - margin.bottom, margin.top])
color = d3.scaleOrdinal()
.range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"])
xAxis = g => g
.attr("transform", `translate(0,${height - margin.bottom})`)
.call(d3.axisBottom(x0).tickSizeOuter(0))
.call(g => g.select(".domain").remove())
yAxis = g => g
.attr("transform", `translate(${margin.left},0)`)
.call(d3.axisLeft(y).ticks(null, "s"))
.call(g => g.select(".domain").remove())
.call(g => g.select(".tick:last-of-type text").clone()
.attr("x", 3)
.attr("text-anchor", "start")
.attr("font-weight", "bold")
.text(data.y))
legend = svg => {
const g = svg
.attr("transform", `translate(${width},0)`)
.attr("text-anchor", "end")
.attr("font-family", "sans-serif")
.attr("font-size", 10)
.selectAll("g")
.data(color.domain().slice().reverse())
.join("g")
.attr("transform", (d, i) => `translate(0,${i * 20})`);
g.append("rect")
.attr("x", -19)
.attr("width", 19)
.attr("height", 19)
.attr("fill", color);
g.append("text")
.attr("x", -24)
.attr("y", 9.5)
.attr("dy", "0.35em")
.text(d => d);
}
chart = {
const svg = d3.select(DOM.svg(width, height));
svg.append("g")
.selectAll("g")
.data(data)
.join("g")
.attr("transform", d => `translate(${x0(d[groupKey])},0)`)
.selectAll("rect")
.data(d => keys.map(key => ({key, value: d[key]})))
.join("rect")
.attr("x", d => x1(d.key))
.attr("y", d => y(d.value))
.attr("width", x1.bandwidth())
.attr("height", d => y(0) - y(d.value))
.attr("fill", d => color(d.key));
svg.append("g")
.call(xAxis);
svg.append("g")
.call(yAxis);
svg.append("g")
.call(legend);
return svg.node();
}
之后,我从html脚本调用index.js文件
<!DOCTYPE html>
<html>
<head>
<title>Visualization 2 (Multiline graph)</title>
<link rel="stylesheet" href="styles.css">
<script src="https://unpkg.com/d3@5.6.0/dist/d3.min.js"></script>
</head>
<body>
<svg width="960" height="500"></svg>
<script src="index.js"></script>
</body>
</html>
此代码未提供vizhub中此图形所需的输出。
如何获得所需的输出。这是
更新:
代码在vizhub中给了我以下错误
SyntaxError: Unexpected keyword 'const' (57:4)
/index.js (line 57)
53 : .attr("dy", "0.35em")
54 : .text(d => d);
55 : }
56 : chart = {
57 : const svg = d3.select(DOM.svg(width, height));
^
首先要注意的是,运行在上的javascript是不同风格的js。它需要一个特殊的库运行时才能在浏览器上运行。因此,如果您将代码复制并粘贴到.js.html文件中,它将无法立即工作 如果您正在学习d3并喜欢可观察的环境,您可以使用运行时轻松地下载/嵌入代码到页面上 例如,从observable获取笔记本代码,从JSDeliver获取运行时。 请记住,您可以下载源代码并从自己的服务器托管它。 下面的代码呈现单元格
图表
,运行时确保所有其他相关单元格按顺序执行
从导入{Runtime,Inspector}”https://cdn.jsdelivr.net/npm/@可观察EHQ/runtime@4/dist/runtime.js”;
“导入定义自”https://api.observablehq.com/@d3/分组条形图。js?v=3”;
const inspect=检查员进入(#可观察EHQ-758e3cb7”);
(新运行时).module(定义,名称=>name==“图表”?检查():未定义);
SyntaxError: Unexpected keyword 'const' (57:4)
/index.js (line 57)
53 : .attr("dy", "0.35em")
54 : .text(d => d);
55 : }
56 : chart = {
57 : const svg = d3.select(DOM.svg(width, height));
^