Javascript - Plotly.js数字频率排序

// 示例数据
var data = [1, 2, 3, 2, 1, 3, 3, 4, 5, 4, 3, 2, 1];

// 统计频率
var frequency = {};
data.forEach(function(number) {
  frequency[number] = frequency[number] || 0;
  frequency[number]++;
});

// 转换为对象数组
var frequencyArray = Object.keys(frequency).map(function(number) {
  return { number: number, frequency: frequency[number] };
});

// 按频率排序
frequencyArray.sort(function(a, b) {
  return b.frequency - a.frequency;
});

// 提取数字和频率数组
var numbers = frequencyArray.map(function(item) {
  return item.number;
});
var frequencies = frequencyArray.map(function(item) {
  return item.frequency;
});

// 创建柱状图
var trace = {
  x: numbers,
  y: frequencies,
  type: 'bar'
};
var data = [trace];
var layout = {
  title: '数字频率排序',
  xaxis: {
    title: '数字'
  },
  yaxis: {
    title: '频率'
  }
};
Plotly.newPlot('chart', data, layout);