如何根據每個月的天數獲得平均溫度

我正在嘗試通過此操作獲得溫度平均值：總溫度（一個月）除以該月中的天數（如果該月（xAxis 變數）存在于 createdAt（回應變數）中))。

例如：11 月的天數是（取決于 response.createdAt）：3 12 月的天數是（取決于 response.createdAt）：2

然后，將它們用于操作。

我知道我的解釋可能有歧義，所以如果您需要更精確，請不要猶豫。

var response = [{
    "id": 294,
    "createdAt": "2021-12-08T00:00:00",
    "zipcode": "33000",
    "value": "{\"Temperature\":4.93,\"Humidity\":90}"
},{
    "id": 294,
    "createdAt": "2021-12-08T00:00:00",
    "zipcode": "33000",
    "value": "{\"Temperature\":7.93,\"Humidity\":90}"
},
{
    "id": 294,
    "createdAt": "2021-11-08T00:00:00",
    "zipcode": "33000",
    "value": "{\"Temperature\":44.93,\"Humidity\":90}"
},{
    "id": 294,
    "createdAt": "2021-11-08T00:00:00",
    "zipcode": "33000",
    "value": "{\"Temperature\":2.93,\"Humidity\":90}"
},
{
    "id": 294,
    "createdAt": "2021-11-08T00:00:00",
    "zipcode": "33000",
    "value": "{\"Temperature\":3.93,\"Humidity\":90}"
}];
var xAxis = ['10','11','12']; // contains months (representinf as integer)
var temperatureFinal = Array(xAxis.length).fill(null);

response.forEach(function(item){
  var dateData = moment(item.createdAt).format("MM");
  xAxis.forEach(function(value){
    if(dateData == value) temperatureFinal[xAxis.indexOf(value)] = JSON.parse(item.value).Temperature;
  });
});

temperatureFinal.map(h=>console.log(h));

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js" integrity="sha512-qTXRIMyZIFb8iQcfjXWCO8 M5Tbc38Qi5WzdPOYZHIlZpzBHG3L3by84BBBOiRGiEb7KKtAOAs5qYdUiZiQNNQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>

uj5u.com熱心網友回復：

如果您跟蹤每個月的計數，您可以實作這一點。那么平均值就是運行總和除以每個月的事件數。一個物件非常適合跟蹤多個屬性。

var response = [
  {
    "id": 294,
    "createdAt": "2021-12-08T00:00:00",
    "zipcode": "33000",
    "value": "{\"Temperature\":4.93,\"Humidity\":90}"
  },
  {
    "id": 294,
    "createdAt": "2021-12-08T00:00:00",
    "zipcode": "33000",
    "value": "{\"Temperature\":7.93,\"Humidity\":90}"
  },
  {
    "id": 294,
    "createdAt": "2021-11-08T00:00:00",
    "zipcode": "33000",
    "value": "{\"Temperature\":44.93,\"Humidity\":90}"
  }, {
    "id": 294,
    "createdAt": "2021-11-08T00:00:00",
    "zipcode": "33000",
    "value": "{\"Temperature\":2.93,\"Humidity\":90}"
  },
  {
    "id": 294,
    "createdAt": "2021-11-08T00:00:00",
    "zipcode": "33000",
    "value": "{\"Temperature\":3.93,\"Humidity\":90}"
  }
];
var xAxis = ['10', '11', '12']; // contains months (representing as integer)
var temperatureFinal = {};
xAxis.forEach(month => {
  temperatureFinal[month] = {
    month,
    count: 0,
    sum: 0,
    average: 0
  }
});

response.forEach(function(item) {
  var dateData = moment(item.createdAt).format("MM");
  xAxis.forEach(function(value) {
    if (dateData == value) {
      temperatureFinal[value].sum  = JSON.parse(item.value).Temperature;
      temperatureFinal[value].count  ;
      temperatureFinal[value].average = temperatureFinal[value].sum/temperatureFinal[value].count;
    }
  });
});

Object.values(temperatureFinal).map(h => console.log(h));

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js" integrity="sha512-qTXRIMyZIFb8iQcfjXWCO8 M5Tbc38Qi5WzdPOYZHIlZpzBHG3L3by84BBBOiRGiEb7KKtAOAs5qYdUiZiQNNQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>

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