我只是一个试图制作条形图,每秒钟动态更新的人。我发现JS是个不错的选择(我无法弄清楚如何使用Excel)。
在对JS进行一些研究并最终使其动态化并按最高值排序后,我发现了一些问题,我希望你能帮助我:
const CHART = document.getElementById("chart");
Chart.defaults.global.animation.duration = 1000;
Chart.plugins.register({
beforeUpdate: function(chart) {
if (chart.options.sort) {
let dataArray = chart.data.datasets[0].data.slice();
let dataIndexes = dataArray.map((d, i) => i);
dataIndexes.sort((a, b) => {
return dataArray[a] - dataArray[b];
});
// sort data array as well
dataArray.sort((a, b) => b - a);
// At this point dataIndexes is sorted by value of the data, so we know how the indexes map to each other
let meta = chart.getDatasetMeta(0);
let newMeta = [];
let labels = chart.data.labels;
let newLabels = [];
meta.data.forEach((a, i) => {
newMeta[dataIndexes[i]] = a;
newLabels[dataIndexes[i]] = chart.data.labels[i];
});
meta.data = newMeta;
chart.data.datasets[0].data = dataArray;
chart.data.labels = newLabels;
}
}
});
setInterval(function() {
let barChart = new Chart(CHART, {
type: 'horizontalBar',
data: {
labels: ['Chicken', 'Tuna', 'Cow', 'Pig', 'Dog', 'Mermaid'],
datasets: [{
label: "Animals (and Mermaid)",
//How to stick this background colors to each label
backgroundColor: [
"#467261",
"#556e69",
"#555341",
"#4e6577",
"#537061",
"#44656e"
],
data: [Math.random()*1000, Math.random()*1000, Math.random()*1000, Math.random()*1000, Math.random()*1000, Math.random()*1000]
}]
},
options: {
scales: {
xAxes: [{
ticks: {
beginAtZero: true
}
}],
yAxes: [{
barThickness: 30
}]
}
}
});
barChart.options.sort = true;
barChart.update();
},3000);
提前致谢
您可以在单个阵列中创建数据,并按每个间隔的随机值对其进行排序,并将它们一起排序。
var adata = [
["Chicken", "red", Math.random()*1000],
["Tuna", "#556e69", Math.random()*1000],
["Cow", "#555341", Math.random()*1000],
["Pig", "#4e6577", Math.random()*1000],
["Dog", "#537061", Math.random()*1000],
["Mermaid", "#44656e", Math.random()*1000],
];
adata.sort(function(a, b) {return b[2] - a[2];});
然后,您必须删除beforeUpdate中完成的所有排序功能。
但是:ぁzxswい