数据转化-如图
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<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
</head>
<body>
<script>
let data = {
example: [
{
year: "1991",
value: 7234,
},
{
year: "1992",
value: 4321,
},
{
year: "1993",
value: 3312,
},
{
year: "1994",
value: 4522,
},
{
year: "1995",
value: 4321,
},
{
year: "1996",
value: 6322,
},
],
example1: [
{
year: "1991",
value: 6234,
},
{
year: "1992",
value: 6321,
},
{
year: "1993",
value: 6312,
},
{
year: "1997",
value: 2310,
},
],
};
let xData = new Set();
let tempY = {};
for (const key in data) {
tempY[key] = {};
data[key].forEach((item) => {
xData.add(item.year);
tempY[key][item.year] = item.value;
});
}
console.log(data);
// console.log(tempY);
let yData = {};
for (const key in tempY) {
let subYdata = [];
for (let x of xData) {
if (tempY[key].hasOwnProperty(x)) subYdata.push(tempY[key][x]);
else subYdata.push(null);
}
yData[key] = subYdata;
}
console.log("xData", [...xData]);
console.log("yData", yData);
</script>
</body>
</html>
