学习JavaScript和D3。
尝试创建一个图表,其中一次在一个系列中绘制每行,一次或延迟间隔。
我到目前为止得到的(本文末尾的相关代码)
https://jsfiddle.net/jimdholland/5n6xrlk0/180/
我的数据是每个系列作为一行的结构,带有12列。当您阅读它时,该对象大约看起来像
mydata = [
{NumDays01: "0", NumDays02: "0", NumDays03: "0", NumDays04: "0", NumDays05: "0",Numdays06: 30}
1: {NumDays01: "0", NumDays02: "0", NumDays03: "0", NumDays04: "0",...
]
我可以得到它来创建线路,但是它立即绘制所有路径。同样,我尝试了一个循环,但这仍然一次绘制它们。还尝试了D3.Timer和类似的结果。但是我很难理解计时器回调的内容并正确创建这些功能。
除了来自FlowingData的图表外,我还没有找到其他示例,该图表中有很多钟声和哨子。https://flowingdata.com/2019/02/01/how-many-kids-we-have-and-and-when-we-have-them/
任何帮助或提示都将不胜感激。
var svg = d3.select("#chart").select("svg"),
margin = { top: 30, right: 20, bottom: 10, left: 40 },
width = parseInt(d3.select("#chart").style('width'), 10) - margin.left - margin.right;
d3.tsv("https://s3.us-east-2.amazonaws.com/jamesdhollandwebfiles/data/improvementTest.tsv", function(error, data) {
if (error) throw error;
console.log(data);
myData = data;
var t = d3.timer(pathMaker);
}); // @end d3.tsv()
function pathMaker() {
var peeps = myData[rowToRun];
var coords = [];
var lineToRemove = [];
for (var nameIter in dayList) {
coords.push({ x: x(nameIter), y: y(peeps[dayList[nameIter]])})
}
var improvementPath = g.append("path")
.datum(coords)
.attr("id", "path" + peeps.caseid)
.attr("d", lineMaker)
.attr("stroke", "#90c6e4")
.attr("fill", "none")
.attr("stroke-width", 2);
var total_length = improvementPath.node().getTotalLength();
var startPoint = pathStartPoint(improvementPath);
improvementPath = improvementPath
.attr("stroke-dasharray", total_length + " " + total_length)
.attr("stroke-dashoffset", total_length)
.transition() // Call Transition Method
.duration(4000) // Set Duration timing (ms)
.ease(d3.easeLinear) // Set Easing option
.attr("stroke-dashoffset", 0); // Set final value of dash-offset for transition
rowToRun += 1;
if (rowToRun == 5) {rowToRun = 0;}
}
//Get path start point for placing marker
function pathStartPoint(Mypath) {
var d = Mypath.attr("d"),
dsplitted = d.split(/M|L/)[1];
return dsplitted;
}
有一些问题。我试图尽可能少地配置您的代码以使其正常工作。如果您需要进一步的解释,请让我知道
d3.tsv("https://s3.us-east-2.amazonaws.com/jamesdhollandwebfiles/data/improvementTest.tsv", function(error, data) {
if (error) throw error;
console.log(data);
myData = data;
pathMaker()
}); // @end d3.tsv()
function pathMaker() {
var peeps = myData[rowToRun];
var coords_data = [];
var lineToRemove = [];
for (let i = 0; i < myData.length; i++) {
var coords = [];
for (var nameIter in dayList) {
coords.push({ x: x(nameIter), y: y(myData[i][dayList[nameIter]])})
}
coords_data.push(coords)
}
console.log(coords_data)
var improvementPath = g.selectAll("path")
.data(coords_data)
.enter()
.append("path")
.attr("d", lineMaker)
.attr("stroke", "#90c6e4")
.attr("fill", "none")
.attr("stroke-width", 2);
improvementPath = improvementPath.each(function (d,i) {
var total_length = this.getTotalLength();
var startPoint = pathStartPoint(improvementPath);
const path = d3.select(this)
.attr("stroke-dasharray", total_length + " " + total_length)
.attr("stroke-dashoffset", total_length)
.transition() // Call Transition Method
.duration(4000) // Set Duration timing (ms)
.delay(i*4000)
.ease(d3.easeLinear) // Set Easing option
.attr("stroke-dashoffset", 0); // Set final value of dash-offset for transition
})
rowToRun += 1;
if (rowToRun == 5) {rowToRun = 0;}
}