I have a large JavaScript array of objects. Each object contains temperature data for each month for many years. I would like to find the average temperature data for each temperature-type for each month (there are actually 13 months in my data intentionally, so I want averages for 13 months).
In this jsfiddle, I have been playing with a very small subset of the data:
const array1 =
[
{
"Year": 1980,
"Month": 0,
"Tmin": null,
"Tmean": 11.1914,
"Tmax": null,
"Td": 7.01668,
"RHmean": 76.1544,
"RHmax": 61.7298,
"WBGTmin": 8.3829,
"WBGTmean": 9.75617,
"WBGTmax": null,
"WBGTmaxSun": null,
"UTCImin": 9.41549,
"UTCImean": 11.5612,
"UTCImax": null,
"HImin": 8.03456,
"HImean": 10.9305,
"HImax": 14.2173
},
{
"Year": 1980,
"Month": 1,
"Tmin": 11.931,
"Tmean": 15.0778,
"Tmax": 18.1379,
"Td": 10.4667,
"RHmean": 74.6458,
"RHmax": 61.0794,
"WBGTmin": 11.3724,
"WBGTmean": 13.3417,
"WBGTmax": 15.1419,
"WBGTmaxSun": null,
"UTCImin": 12.7629,
"UTCImean": 15.5132,
"UTCImax": 18.0733,
"HImin": 11.5267,
"HImean": 14.5908,
"HImax": 17.6032
},
{
"Year": 1980,
"Month": 2,
"Tmin": 10.8621,
"Tmean": 14.3429,
"Tmax": 18.1379,
"Td": 9.55555,
"RHmean": 73.3624,
"RHmax": 58.0879,
"WBGTmin": 10.4187,
"WBGTmean": 12.5424,
"WBGTmax": 14.8529,
"WBGTmaxSun": null,
"UTCImin": 11.663,
"UTCImean": 14.6836,
"UTCImax": 17.9196,
"HImin": 10.3846,
"HImean": 13.7489,
"HImax": 17.5251
},
{
"Year": 1980,
"Month": 3,
"Tmin": 11.069,
"Tmean": 13.7278,
"Tmax": 17.3103,
"Td": 9.47038,
"RHmean": 76.4473,
"RHmax": 61.5543,
"WBGTmin": 10.6146,
"WBGTmean": 12.1394,
"WBGTmax": 14.3354,
"WBGTmaxSun": null,
"UTCImin": 11.8356,
"UTCImean": 14.1294,
"UTCImax": 17.2034,
"HImin": 10.57,
"HImean": 13.1527,
"HImax": 16.7052
},
{
"Year": 1980,
"Month": 4,
"Tmin": 9.37931,
"Tmean": 12.9241,
"Tmax": 16.2759,
"Td": 8.23148,
"RHmean": 74.3115,
"RHmax": 59.5891,
"WBGTmin": 9.04303,
"WBGTmean": 11.2406,
"WBGTmax": 13.2503,
"WBGTmaxSun": null,
"UTCImin": 10.0756,
"UTCImean": 13.2498,
"UTCImax": 16.0892,
"HImin": 8.72126,
"HImean": 12.2128,
"HImax": 15.5158
},
{
"Year": 1980,
"Month": 5,
"Tmin": 8.07407,
"Tmean": 10.6399,
"Tmax": 14.4444,
"Td": null,
"RHmean": 76.2411,
"RHmax": 60.2131,
"WBGTmin": 7.57442,
"WBGTmean": null,
"WBGTmax": null,
"WBGTmaxSun": null,
"UTCImin": 8.70486,
"UTCImean": null,
"UTCImax": null,
"HImin": 7.28312,
"HImean": 9.75634,
"HImax": 13.4938
},
{
"Year": 1980,
"Month": 7,
"Tmin": 3.87097,
"Tmean": 6.74194,
"Tmax": 10.8065,
"Td": 2.06452,
"RHmean": 72.9362,
"RHmax": 55.8054,
"WBGTmin": 3.4279,
"WBGTmean": 5.32629,
"WBGTmax": 8.05513,
"WBGTmaxSun": null,
"UTCImin": 4.16556,
"UTCImean": 6.88706,
"UTCImax": 10.5796,
"HImin": 2.5963,
"HImean": 5.3759,
"HImax": 9.3998
},
{
"Year": 1980,
"Month": 9,
"Tmin": 6.23333,
"Tmean": 8.97223,
"Tmax": 11.6,
"Td": 6.1037,
"RHmean": 82.351,
"RHmax": 69.5854,
"WBGTmin": 6.31845,
"WBGTmean": 8.00618,
"WBGTmax": 9.71308,
"WBGTmaxSun": null,
"UTCImin": 6.92209,
"UTCImean": 9.45113,
"UTCImax": 11.7794,
"HImin": 5.4295,
"HImean": 8.07536,
"HImax": 10.6328
},
{
"Year": 1980,
"Month": 10,
"Tmin": 8.43333,
"Tmean": 11.2852,
"Tmax": 13.6667,
"Td": 7.64815,
"RHmean": 78.9403,
"RHmax": 67.924,
"WBGTmin": 8.29363,
"WBGTmean": 10.0097,
"WBGTmax": 11.5281,
"WBGTmaxSun": null,
"UTCImin": 9.19437,
"UTCImean": 11.7425,
"UTCImax": 13.8014,
"HImin": 7.76501,
"HImean": 10.5307,
"HImax": 12.863
},
{
"Year": 1981,
"Month": 0,
"Tmin": 8.54919,
"Tmean": 11.5048,
"Tmax": 14.5909,
"Td": 7.70727,
"RHmean": 79.2693,
"RHmax": 65.5782,
"WBGTmin": 8.81321,
"WBGTmean": 10.2214,
"WBGTmax": 12.1636,
"WBGTmaxSun": 13.6712,
"UTCImin": 9.60639,
"UTCImean": 11.9768,
"UTCImax": 14.6651,
"HImin": 8.13911,
"HImean": 11.1262,
"HImax": 14.1329
},
{
"Year": 1981,
"Month": 1,
"Tmin": 10.9355,
"Tmean": 14.6649,
"Tmax": 18.1935,
"Td": 12.0968,
"RHmean": 84.7151,
"RHmax": 67.9045,
"WBGTmin": 11.7611,
"WBGTmean": 13.6596,
"WBGTmax": 15.7362,
"WBGTmaxSun": 18.1962,
"UTCImin": 12.2129,
"UTCImean": 15.4285,
"UTCImax": 18.4067,
"HImin": 10.6675,
"HImean": 14.3994,
"HImax": 17.8426
},
{
"Year": 1981,
"Month": 2,
"Tmin": 12.0741,
"Tmean": 14.5041,
"Tmax": 17.5185,
"Td": 12.251,
"RHmean": 86.5258,
"RHmax": 72.0491,
"WBGTmin": 12.3043,
"WBGTmean": 13.6124,
"WBGTmax": 15.4261,
"WBGTmaxSun": 17.545,
"UTCImin": 13.2307,
"UTCImean": 15.3403,
"UTCImax": 17.8944,
"HImin": 11.8769,
"HImean": 14.2698,
"HImax": 17.2081
},
{
"Year": 1981,
"Month": 3,
"Tmin": 12.4074,
"Tmean": 15.4167,
"Tmax": 18.2593,
"Td": 12.6071,
"RHmean": 83.9611,
"RHmax": 70.3348,
"WBGTmin": 12.668,
"WBGTmean": 14.3096,
"WBGTmax": 15.9688,
"WBGTmaxSun": 17.5687,
"UTCImin": 13.5998,
"UTCImean": 16.1949,
"UTCImax": 18.5757,
"HImin": 12.2142,
"HImean": 15.2067,
"HImax": 17.9783
},
{
"Year": 1981,
"Month": 4,
"Tmin": 10,
"Tmean": 12.7361,
"Tmax": 15.8571,
"Td": 9.64087,
"RHmean": 82.5259,
"RHmax": 67.9274,
"WBGTmin": 10.0824,
"WBGTmean": 11.6051,
"WBGTmax": 13.5108,
"WBGTmaxSun": 14.592,
"UTCImin": 10.9405,
"UTCImean": 13.3256,
"UTCImax": 15.999,
"HImin": 9.51275,
"HImean": 12.2205,
"HImax": 15.2729
},
{
"Year": 1981,
"Month": 5,
"Tmin": 7.77419,
"Tmean": 10.0627,
"Tmax": 13.6129,
"Td": 5.78494,
"RHmean": 75.9491,
"RHmax": 61.0582,
"WBGTmin": 7.20217,
"WBGTmean": 8.64684,
"WBGTmax": 10.9509,
"WBGTmaxSun": 11.6187,
"UTCImin": 8.33175,
"UTCImean": 10.4036,
"UTCImax": 13.5211,
"HImin": 6.89413,
"HImean": 9.10776,
"HImax": 12.6245
},
{
"Year": 1981,
"Month": 7,
"Tmin": 4.9,
"Tmean": 7.17407,
"Tmax": 10.3667,
"Td": 2.70556,
"RHmean": 74.8556,
"RHmax": 61.1368,
"WBGTmin": 4.34986,
"WBGTmean": 5.8641,
"WBGTmax": 7.98966,
"WBGTmaxSun": 8.615,
"UTCImin": 5.264,
"UTCImean": 7.39827,
"UTCImax": 10.2977,
"HImin": 3.69173,
"HImean": 5.90138,
"HImax": 9.05522
},
{
"Year": 1981,
"Month": 8,
"Tmin": 4.45161,
"Tmean": 7.92652,
"Tmax": 11.871,
"Td": 0.390681,
"RHmean": 61.2032,
"RHmax": 47.431,
"WBGTmin": 3.40579,
"WBGTmean": 5.77148,
"WBGTmax": 8.40882,
"WBGTmaxSun": 9.3788,
"UTCImin": 4.54988,
"UTCImean": 7.83204,
"UTCImax": 11.4088,
"HImin": 2.9492,
"HImean": 6.37245,
"HImax": 10.352
},
{
"Year": 1981,
"Month": 9,
"Tmin": 4.2,
"Tmean": 8.3537,
"Tmax": 10.8667,
"Td": 5.32407,
"RHmean": 81.6902,
"RHmax": 69.417,
"WBGTmin": 5.1251,
"WBGTmean": 7.35119,
"WBGTmax": 9.0068,
"WBGTmaxSun": 10.4248,
"UTCImin": 4.87588,
"UTCImean": 8.78665,
"UTCImax": 11.0342,
"HImin": 3.20796,
"HImean": 7.37767,
"HImax": 9.82164
},
{
"Year": 1981,
"Month": 10,
"Tmin": 7.48387,
"Tmean": 11.0681,
"Tmax": 13.6774,
"Td": 7.32616,
"RHmean": 78.8369,
"RHmax": 67.1361,
"WBGTmin": 7.72401,
"WBGTmean": 9.77781,
"WBGTmax": 11.4299,
"WBGTmaxSun": 13.2976,
"UTCImin": 8.26469,
"UTCImean": 11.5077,
"UTCImax": 13.7745,
"HImin": 6.74846,
"HImean": 10.2892,
"HImax": 12.8542
},
{
"Year": 1981,
"Month": 11,
"Tmin": 10.1379,
"Tmean": 13.2088,
"Tmax": 16.0345,
"Td": 9.78353,
"RHmean": 80.1912,
"RHmax": 67.215,
"WBGTmin": 10.1662,
"WBGTmean": 11.9142,
"WBGTmax": 13.6553,
"WBGTmaxSun": 15.937,
"UTCImin": 11.0545,
"UTCImean": 13.74,
"UTCImax": 16.1454,
"HImin": 9.6793,
"HImean": 12.6796,
"HImax": 15.4494
},
{
"Year": 1981,
"Month": 12,
"Tmin": 12.3262,
"Tmean": 14.8907,
"Tmax": 17.3871,
"Td": 11.7276,
"RHmean": 81.5082,
"RHmax": 69.7501,
"WBGTmin": 12.1564,
"WBGTmean": 13.6467,
"WBGTmax": 15.1406,
"WBGTmaxSun": 17.6416,
"UTCImin": 13.3456,
"UTCImean": 15.5432,
"UTCImax": 17.6521,
"HImin": 12.0881,
"HImean": 14.5641,
"HImax": 17.0036
},
{
"Year": 1982,
"Month": 0,
"Tmin": 7.17557,
"Tmean": 11.1063,
"Tmax": 14.9062,
"Td": 6.62961,
"RHmean": 74.9441,
"RHmax": 59.1579,
"WBGTmin": 7.3061,
"WBGTmean": 9.60836,
"WBGTmax": 12.0246,
"WBGTmaxSun": 13.5322,
"UTCImin": 7.93259,
"UTCImean": 11.4494,
"UTCImax": 14.7667,
"HImin": 6.40302,
"HImean": 10.2599,
"HImax": 14.0271
},
{
"Year": 1982,
"Month": 1,
"Tmin": 10.3389,
"Tmean": 14.1222,
"Tmax": 17.5019,
"Td": 10.3722,
"RHmean": 78.3829,
"RHmax": 63.6444,
"WBGTmin": 10.5689,
"WBGTmean": 12.6951,
"WBGTmax": 14.7305,
"WBGTmaxSun": 17.1905,
"UTCImin": 11.3631,
"UTCImean": 14.632,
"UTCImax": 17.5026,
"HImin": 9.92938,
"HImean": 13.6372,
"HImax": 16.9704
},
{
"Year": 1982,
"Month": 2,
"Tmin": 12.248,
"Tmean": 15.379,
"Tmax": 18.9484,
"Td": 12.2222,
"RHmean": 81.5975,
"RHmax": 65.3673,
"WBGTmin": 12.3504,
"WBGTmean": 14.1349,
"WBGTmax": 16.2461,
"WBGTmaxSun": 18.365,
"UTCImin": 13.3921,
"UTCImean": 16.0678,
"UTCImax": 19.0792,
"HImin": 12.0642,
"HImean": 15.1036,
"HImax": 18.6068
},
{
"Year": 1982,
"Month": 3,
"Tmin": 10.6264,
"Tmean": 14.567,
"Tmax": 18.228,
"Td": 10.5268,
"RHmean": 77.2457,
"RHmax": 61.7686,
"WBGTmin": 10.8023,
"WBGTmean": 13.0499,
"WBGTmax": 15.2515,
"WBGTmaxSun": 16.8514,
"UTCImin": 11.6506,
"UTCImean": 15.059,
"UTCImax": 18.1618,
"HImin": 10.2382,
"HImean": 14.0968,
"HImax": 17.7203
},
{
"Year": 1982,
"Month": 4,
"Tmin": 8.28927,
"Tmean": 12.3774,
"Tmax": 16.6935,
"Td": 7.12836,
"RHmean": 71.6036,
"RHmax": 54.429,
"WBGTmin": 8.07749,
"WBGTmean": 10.5633,
"WBGTmax": 13.249,
"WBGTmaxSun": 14.3302,
"UTCImin": 9.00788,
"UTCImean": 12.6247,
"UTCImax": 16.3256,
"HImin": 7.55299,
"HImean": 11.5407,
"HImax": 15.8404
},
{
"Year": 1982,
"Month": 5,
"Tmin": 6.78927,
"Tmean": 10.3755,
"Tmax": 14.2874,
"Td": 6.6705,
"RHmean": 78.6915,
"RHmax": 61.921,
"WBGTmin": 7.05394,
"WBGTmean": 9.11994,
"WBGTmax": 11.6353,
"WBGTmaxSun": 12.3031,
"UTCImin": 7.54962,
"UTCImean": 10.7974,
"UTCImax": 14.2113,
"HImin": 5.98517,
"HImean": 9.52347,
"HImax": 13.389
},
{
"Year": 1982,
"Month": 6,
"Tmin": 4.53704,
"Tmean": 8.02778,
"Tmax": 12.8556,
"Td": 1.36296,
"RHmean": 63.9868,
"RHmax": 46.6503,
"WBGTmin": 3.75934,
"WBGTmean": 6.06368,
"WBGTmax": 9.27825,
"WBGTmaxSun": 9.8104,
"UTCImin": 4.75433,
"UTCImean": 8.01639,
"UTCImax": 12.3611,
"HImin": 3.1271,
"HImean": 6.55658,
"HImax": 11.4148
},
{
"Year": 1982,
"Month": 7,
"Tmin": 3.00896,
"Tmean": 6.69176,
"Tmax": 11.5233,
"Td": 0.281363,
"RHmean": 65.0132,
"RHmax": 47.4322,
"WBGTmin": 2.50418,
"WBGTmean": 4.87147,
"WBGTmax": 8.14736,
"WBGTmaxSun": 8.7727,
"UTCImin": 3.12808,
"UTCImean": 6.64994,
"UTCImax": 11.0682,
"HImin": 1.4728,
"HImean": 5.11363,
"HImax": 9.96959
},
{
"Year": 1982,
"Month": 8,
"Tmin": 3.89074,
"Tmean": 8.25926,
"Tmax": 11.8352,
"Td": 4.6963,
"RHmean": 78.8587,
"RHmax": 62.6882,
"WBGTmin": 4.70963,
"WBGTmean": 7.12274,
"WBGTmax": 9.46413,
"WBGTmaxSun": 10.4341,
"UTCImin": 4.53797,
"UTCImean": 8.6311,
"UTCImax": 11.8118,
"HImin": 2.82464,
"HImean": 7.1998,
"HImax": 10.7114
},
{
"Year": 1982,
"Month": 9,
"Tmin": 5.52778,
"Tmean": 9.90556,
"Tmax": 13.4352,
"Td": 5.8963,
"RHmean": 76.7366,
"RHmax": 61.2182,
"WBGTmin": 5.94218,
"WBGTmean": 8.55935,
"WBGTmax": 10.8363,
"WBGTmaxSun": 12.2543,
"UTCImin": 6.25308,
"UTCImean": 10.2701,
"UTCImax": 13.3514,
"HImin": 4.66327,
"HImean": 8.95547,
"HImax": 12.4332
},
{
"Year": 1982,
"Month": 10,
"Tmin": 4.80159,
"Tmean": 10.1171,
"Tmax": 13.8651,
"Td": 4.42659,
"RHmean": 70.1723,
"RHmax": 55.4714,
"WBGTmin": 5.06719,
"WBGTmean": 8.30009,
"WBGTmax": 10.719,
"WBGTmaxSun": 12.5867,
"UTCImin": 5.37704,
"UTCImean": 10.2803,
"UTCImax": 13.5843,
"HImin": 3.73974,
"HImean": 9.01666,
"HImax": 12.756
},
{
"Year": 1982,
"Month": 11,
"Tmin": 8.21839,
"Tmean": 11.5766,
"Tmax": 14.4866,
"Td": 7.87931,
"RHmean": 78.7804,
"RHmax": 65.8273,
"WBGTmin": 8.29848,
"WBGTmean": 10.2893,
"WBGTmax": 12.1182,
"WBGTmaxSun": 14.3999,
"UTCImin": 9.03572,
"UTCImean": 12.0431,
"UTCImax": 14.5568,
"HImin": 7.56246,
"HImean": 10.8471,
"HImax": 13.7102
},
{
"Year": 1982,
"Month": 12,
"Tmin": 8.25269,
"Tmean": 12.2079,
"Tmax": 15.5358,
"Td": 8.49641,
"RHmean": 78.2601,
"RHmax": 63.4765,
"WBGTmin": 8.53918,
"WBGTmean": 10.8732,
"WBGTmax": 12.944,
"WBGTmaxSun": 15.445,
"UTCImin": 9.14154,
"UTCImean": 12.6763,
"UTCImax": 15.5241,
"HImin": 7.67627,
"HImean": 11.528,
"HImax": 14.8032
}
];
function averages({avg, n}, tempInfo) {
if (tempInfo.WBGTmaxSun == null) {
return {avg, n};
}
return {
avg: (tempInfo.WBGTmaxSun n * avg) / (n 1),
n: n 1,
};
}
// Calculations
// ----------------------------------------------------------------------------
// Calculate the average and display.
const initialVals = {avg: 0, n: 0};
const averageVals = array1.reduce(averages, initialVals).avg;
console.log("Average:", averageVals);
//PSEUDOCODE:
// for each month:
// for each tempType:
// call array1.reduce(averages, initialVals).avg;
var avgx = array1
.filter((x) => {
return x.Month === 1;
})
.map(function(obj) {return obj.WBGTmaxSun})
.reduce(function(a, b) { return a b });
console.log("Average:", avgx);I have explored the functions reduce(), map(), and filter().
I managed to get the code to work for all months, but for only one temperature-type (WBGTmaxSun).
However, the result I want is an array containing all temperature-types, with each temperature-type having an array of temperatures for each month. Here is a screenshot of the output of my existing code, however the code is inefficient and doesn't ignore nulls in the calculations:
In the original array of objects, some temperature-type properties have null values, so they should not influence the average calculations.
I was hoping to use my current code in the jsfiddle inside 2 loops. Here is some pseduocode:
for each month:
for each tempType:
call array1.reduce(averages, initialVals).avg;
However, I don't know how to pass parameters for the month and temperature-type into the averages() function.
I could use multiple loops to achieve all of this, but I want to write efficient code. I have studied this page for assistance: FUNCTIONAL JAVASCRIPT, however I've hit a wall.
CodePudding user response：
Loop over your object, adding entries to the result object for each type and month when first encountered. Otherwise just add the result to the existing type and month in the result object.
let result = {};
array1.forEach(({Year, Month, ...temps}) => {
Object.entries(temps).forEach(([type, temp]) => {
if (temp === null) { // skip null values
return;
}
// Add entry for temperature type of it doesn't exist
if (!(type in result)) {
result[type] = [];
}
// Use month as array index within type
if (result[type][Month]) {
result[type][Month].push(temp);
} else {
result[type][Month] = [temp];
}
});
});
const array1 = [{
"Year": 1980,
"Month": 0,
"Tmin": null,
"Tmean": 11.1914,
"Tmax": null,
"Td": 7.01668,
"RHmean": 76.1544,
"RHmax": 61.7298,
"WBGTmin": 8.3829,
"WBGTmean": 9.75617,
"WBGTmax": null,
"WBGTmaxSun": null,
"UTCImin": 9.41549,
"UTCImean": 11.5612,
"UTCImax": null,
"HImin": 8.03456,
"HImean": 10.9305,
"HImax": 14.2173
},
{
"Year": 1980,
"Month": 1,
"Tmin": 11.931,
"Tmean": 15.0778,
"Tmax": 18.1379,
"Td": 10.4667,
"RHmean": 74.6458,
"RHmax": 61.0794,
"WBGTmin": 11.3724,
"WBGTmean": 13.3417,
"WBGTmax": 15.1419,
"WBGTmaxSun": null,
"UTCImin": 12.7629,
"UTCImean": 15.5132,
"UTCImax": 18.0733,
"HImin": 11.5267,
"HImean": 14.5908,
"HImax": 17.6032
},
{
"Year": 1980,
"Month": 2,
"Tmin": 10.8621,
"Tmean": 14.3429,
"Tmax": 18.1379,
"Td": 9.55555,
"RHmean": 73.3624,
"RHmax": 58.0879,
"WBGTmin": 10.4187,
"WBGTmean": 12.5424,
"WBGTmax": 14.8529,
"WBGTmaxSun": null,
"UTCImin": 11.663,
"UTCImean": 14.6836,
"UTCImax": 17.9196,
"HImin": 10.3846,
"HImean": 13.7489,
"HImax": 17.5251
},
{
"Year": 1980,
"Month": 3,
"Tmin": 11.069,
"Tmean": 13.7278,
"Tmax": 17.3103,
"Td": 9.47038,
"RHmean": 76.4473,
"RHmax": 61.5543,
"WBGTmin": 10.6146,
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"WBGTmaxSun": null,
"UTCImin": 11.8356,
"UTCImean": 14.1294,
"UTCImax": 17.2034,
"HImin": 10.57,
"HImean": 13.1527,
"HImax": 16.7052
},
{
"Year": 1980,
"Month": 4,
"Tmin": 9.37931,
"Tmean": 12.9241,
"Tmax": 16.2759,
"Td": 8.23148,
"RHmean": 74.3115,
"RHmax": 59.5891,
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"UTCImin": 10.0756,
"UTCImean": 13.2498,
"UTCImax": 16.0892,
"HImin": 8.72126,
"HImean": 12.2128,
"HImax": 15.5158
},
{
"Year": 1980,
"Month": 5,
"Tmin": 8.07407,
"Tmean": 10.6399,
"Tmax": 14.4444,
"Td": null,
"RHmean": 76.2411,
"RHmax": 60.2131,
"WBGTmin": 7.57442,
"WBGTmean": null,
"WBGTmax": null,
"WBGTmaxSun": null,
"UTCImin": 8.70486,
"UTCImean": null,
"UTCImax": null,
"HImin": 7.28312,
"HImean": 9.75634,
"HImax": 13.4938
},
{
"Year": 1980,
"Month": 7,
"Tmin": 3.87097,
"Tmean": 6.74194,
"Tmax": 10.8065,
"Td": 2.06452,
"RHmean": 72.9362,
"RHmax": 55.8054,
"WBGTmin": 3.4279,
"WBGTmean": 5.32629,
"WBGTmax": 8.05513,
"WBGTmaxSun": null,
"UTCImin": 4.16556,
"UTCImean": 6.88706,
"UTCImax": 10.5796,
"HImin": 2.5963,
"HImean": 5.3759,
"HImax": 9.3998
},
{
"Year": 1980,
"Month": 9,
"Tmin": 6.23333,
"Tmean": 8.97223,
"Tmax": 11.6,
"Td": 6.1037,
"RHmean": 82.351,
"RHmax": 69.5854,
"WBGTmin": 6.31845,
"WBGTmean": 8.00618,
"WBGTmax": 9.71308,
"WBGTmaxSun": null,
"UTCImin": 6.92209,
"UTCImean": 9.45113,
"UTCImax": 11.7794,
"HImin": 5.4295,
"HImean": 8.07536,
"HImax": 10.6328
},
{
"Year": 1980,
"Month": 10,
"Tmin": 8.43333,
"Tmean": 11.2852,
"Tmax": 13.6667,
"Td": 7.64815,
"RHmean": 78.9403,
"RHmax": 67.924,
"WBGTmin": 8.29363,
"WBGTmean": 10.0097,
"WBGTmax": 11.5281,
"WBGTmaxSun": null,
"UTCImin": 9.19437,
"UTCImean": 11.7425,
"UTCImax": 13.8014,
"HImin": 7.76501,
"HImean": 10.5307,
"HImax": 12.863
},
{
"Year": 1981,
"Month": 0,
"Tmin": 8.54919,
"Tmean": 11.5048,
"Tmax": 14.5909,
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"RHmean": 79.2693,
"RHmax": 65.5782,
"WBGTmin": 8.81321,
"WBGTmean": 10.2214,
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"UTCImin": 9.60639,
"UTCImean": 11.9768,
"UTCImax": 14.6651,
"HImin": 8.13911,
"HImean": 11.1262,
"HImax": 14.1329
},
{
"Year": 1981,
"Month": 1,
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"UTCImin": 12.2129,
"UTCImean": 15.4285,
"UTCImax": 18.4067,
"HImin": 10.6675,
"HImean": 14.3994,
"HImax": 17.8426
},
{
"Year": 1981,
"Month": 2,
"Tmin": 12.0741,
"Tmean": 14.5041,
"Tmax": 17.5185,
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"HImin": 11.8769,
"HImean": 14.2698,
"HImax": 17.2081
},
{
"Year": 1981,
"Month": 3,
"Tmin": 12.4074,
"Tmean": 15.4167,
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"RHmean": 83.9611,
"RHmax": 70.3348,
"WBGTmin": 12.668,
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"UTCImax": 18.5757,
"HImin": 12.2142,
"HImean": 15.2067,
"HImax": 17.9783
},
{
"Year": 1981,
"Month": 4,
"Tmin": 10,
"Tmean": 12.7361,
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"RHmean": 82.5259,
"RHmax": 67.9274,
"WBGTmin": 10.0824,
"WBGTmean": 11.6051,
"WBGTmax": 13.5108,
"WBGTmaxSun": 14.592,
"UTCImin": 10.9405,
"UTCImean": 13.3256,
"UTCImax": 15.999,
"HImin": 9.51275,
"HImean": 12.2205,
"HImax": 15.2729
},
{
"Year": 1981,
"Month": 5,
"Tmin": 7.77419,
"Tmean": 10.0627,
"Tmax": 13.6129,
"Td": 5.78494,
"RHmean": 75.9491,
"RHmax": 61.0582,
"WBGTmin": 7.20217,
"WBGTmean": 8.64684,
"WBGTmax": 10.9509,
"WBGTmaxSun": 11.6187,
"UTCImin": 8.33175,
"UTCImean": 10.4036,
"UTCImax": 13.5211,
"HImin": 6.89413,
"HImean": 9.10776,
"HImax": 12.6245
},
{
"Year": 1981,
"Month": 7,
"Tmin": 4.9,
"Tmean": 7.17407,
"Tmax": 10.3667,
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"HImean": 5.90138,
"HImax": 9.05522
},
{
"Year": 1981,
"Month": 8,
"Tmin": 4.45161,
"Tmean": 7.92652,
"Tmax": 11.871,
"Td": 0.390681,
"RHmean": 61.2032,
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"UTCImax": 11.4088,
"HImin": 2.9492,
"HImean": 6.37245,
"HImax": 10.352
},
{
"Year": 1981,
"Month": 9,
"Tmin": 4.2,
"Tmean": 8.3537,
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"UTCImax": 11.0342,
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"HImax": 9.82164
},
{
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"Month": 10,
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"UTCImean": 11.5077,
"UTCImax": 13.7745,
"HImin": 6.74846,
"HImean": 10.2892,
"HImax": 12.8542
},
{
"Year": 1981,
"Month": 11,
"Tmin": 10.1379,
"Tmean": 13.2088,
"Tmax": 16.0345,
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"WBGTmean": 11.9142,
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"UTCImax": 16.1454,
"HImin": 9.6793,
"HImean": 12.6796,
"HImax": 15.4494
},
{
"Year": 1981,
"Month": 12,
"Tmin": 12.3262,
"Tmean": 14.8907,
"Tmax": 17.3871,
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"RHmean": 81.5082,
"RHmax": 69.7501,
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"HImax": 17.0036
},
{
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"Month": 0,
"Tmin": 7.17557,
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"UTCImax": 14.7667,
"HImin": 6.40302,
"HImean": 10.2599,
"HImax": 14.0271
},
{
"Year": 1982,
"Month": 1,
"Tmin": 10.3389,
"Tmean": 14.1222,
"Tmax": 17.5019,
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"RHmean": 78.3829,
"RHmax": 63.6444,
"WBGTmin": 10.5689,
"WBGTmean": 12.6951,
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"UTCImin": 11.3631,
"UTCImean": 14.632,
"UTCImax": 17.5026,
"HImin": 9.92938,
"HImean": 13.6372,
"HImax": 16.9704
},
{
"Year": 1982,
"Month": 2,
"Tmin": 12.248,
"Tmean": 15.379,
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"RHmean": 81.5975,
"RHmax": 65.3673,
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"HImin": 12.0642,
"HImean": 15.1036,
"HImax": 18.6068
},
{
"Year": 1982,
"Month": 3,
"Tmin": 10.6264,
"Tmean": 14.567,
"Tmax": 18.228,
"Td": 10.5268,
"RHmean": 77.2457,
"RHmax": 61.7686,
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"UTCImax": 18.1618,
"HImin": 10.2382,
"HImean": 14.0968,
"HImax": 17.7203
},
{
"Year": 1982,
"Month": 4,
"Tmin": 8.28927,
"Tmean": 12.3774,
"Tmax": 16.6935,
"Td": 7.12836,
"RHmean": 71.6036,
"RHmax": 54.429,
"WBGTmin": 8.07749,
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"WBGTmax": 13.249,
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"UTCImin": 9.00788,
"UTCImean": 12.6247,
"UTCImax": 16.3256,
"HImin": 7.55299,
"HImean": 11.5407,
"HImax": 15.8404
},
{
"Year": 1982,
"Month": 5,
"Tmin": 6.78927,
"Tmean": 10.3755,
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"UTCImax": 14.2113,
"HImin": 5.98517,
"HImean": 9.52347,
"HImax": 13.389
},
{
"Year": 1982,
"Month": 6,
"Tmin": 4.53704,
"Tmean": 8.02778,
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"UTCImax": 12.3611,
"HImin": 3.1271,
"HImean": 6.55658,
"HImax": 11.4148
},
{
"Year": 1982,
"Month": 7,
"Tmin": 3.00896,
"Tmean": 6.69176,
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"HImin": 1.4728,
"HImean": 5.11363,
"HImax": 9.96959
},
{
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"Month": 8,
"Tmin": 3.89074,
"Tmean": 8.25926,
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"RHmax": 62.6882,
"WBGTmin": 4.70963,
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"UTCImax": 11.8118,
"HImin": 2.82464,
"HImean": 7.1998,
"HImax": 10.7114
},
{
"Year": 1982,
"Month": 9,
"Tmin": 5.52778,
"Tmean": 9.90556,
"Tmax": 13.4352,
"Td": 5.8963,
"RHmean": 76.7366,
"RHmax": 61.2182,
"WBGTmin": 5.94218,
"WBGTmean": 8.55935,
"WBGTmax": 10.8363,
"WBGTmaxSun": 12.2543,
"UTCImin": 6.25308,
"UTCImean": 10.2701,
"UTCImax": 13.3514,
"HImin": 4.66327,
"HImean": 8.95547,
"HImax": 12.4332
},
{
"Year": 1982,
"Month": 10,
"Tmin": 4.80159,
"Tmean": 10.1171,
"Tmax": 13.8651,
"Td": 4.42659,
"RHmean": 70.1723,
"RHmax": 55.4714,
"WBGTmin": 5.06719,
"WBGTmean": 8.30009,
"WBGTmax": 10.719,
"WBGTmaxSun": 12.5867,
"UTCImin": 5.37704,
"UTCImean": 10.2803,
"UTCImax": 13.5843,
"HImin": 3.73974,
"HImean": 9.01666,
"HImax": 12.756
},
{
"Year": 1982,
"Month": 11,
"Tmin": 8.21839,
"Tmean": 11.5766,
"Tmax": 14.4866,
"Td": 7.87931,
"RHmean": 78.7804,
"RHmax": 65.8273,
"WBGTmin": 8.29848,
"WBGTmean": 10.2893,
"WBGTmax": 12.1182,
"WBGTmaxSun": 14.3999,
"UTCImin": 9.03572,
"UTCImean": 12.0431,
"UTCImax": 14.5568,
"HImin": 7.56246,
"HImean": 10.8471,
"HImax": 13.7102
},
{
"Year": 1982,
"Month": 12,
"Tmin": 8.25269,
"Tmean": 12.2079,
"Tmax": 15.5358,
"Td": 8.49641,
"RHmean": 78.2601,
"RHmax": 63.4765,
"WBGTmin": 8.53918,
"WBGTmean": 10.8732,
"WBGTmax": 12.944,
"WBGTmaxSun": 15.445,
"UTCImin": 9.14154,
"UTCImean": 12.6763,
"UTCImax": 15.5241,
"HImin": 7.67627,
"HImean": 11.528,
"HImax": 14.8032
}
];
function averages({
avg,
n
}, tempInfo) {
if (tempInfo.WBGTmaxSun == null) {
return {
avg,
n
};
}
return {
avg: (tempInfo.WBGTmaxSun n * avg) / (n 1),
n: n 1,
};
}
// Calculations
// ----------------------------------------------------------------------------
let result = {};
array1.forEach(({Year, Month, ...temps}) => {
Object.entries(temps).forEach(([type, temp]) => {
if (temp === null) { // skip null values
return;
}
// Add entry for temperature type of it doesn't exist
if (!(type in result)) {
result[type] = [];
}
// Use month as array index within type
if (result[type][Month]) {
result[type][Month].push(temp);
} else {
result[type][Month] = [temp];
}
});
});
console.log(result);CodePudding user response：
I have solved this with this code:
const array1 =
[
{
"Year": 1980,
"Month": 0,
"Tmin": null,
"Tmean": 11.1914,
"Tmax": null,
"Td": 7.01668,
"RHmean": 76.1544,
"RHmax": 61.7298,
"WBGTmin": 8.3829,
"WBGTmean": 9.75617,
"WBGTmax": null,
"WBGTmaxSun": null,
"UTCImin": 9.41549,
"UTCImean": 11.5612,
"UTCImax": null,
"HImin": 8.03456,
"HImean": 10.9305,
"HImax": 14.2173
},
{
"Year": 1980,
"Month": 1,
"Tmin": 11.931,
"Tmean": 15.0778,
"Tmax": 18.1379,
"Td": 10.4667,
"RHmean": 74.6458,
"RHmax": 61.0794,
"WBGTmin": 11.3724,
"WBGTmean": 13.3417,
"WBGTmax": 15.1419,
"WBGTmaxSun": null,
"UTCImin": 12.7629,
"UTCImean": 15.5132,
"UTCImax": 18.0733,
"HImin": 11.5267,
"HImean": 14.5908,
"HImax": 17.6032
},
{
"Year": 1980,
"Month": 2,
"Tmin": 10.8621,
"Tmean": 14.3429,
"Tmax": 18.1379,
"Td": 9.55555,
"RHmean": 73.3624,
"RHmax": 58.0879,
"WBGTmin": 10.4187,
"WBGTmean": 12.5424,
"WBGTmax": 14.8529,
"WBGTmaxSun": null,
"UTCImin": 11.663,
"UTCImean": 14.6836,
"UTCImax": 17.9196,
"HImin": 10.3846,
"HImean": 13.7489,
"HImax": 17.5251
},
{
"Year": 1980,
"Month": 3,
"Tmin": 11.069,
"Tmean": 13.7278,
"Tmax": 17.3103,
"Td": 9.47038,
"RHmean": 76.4473,
"RHmax": 61.5543,
"WBGTmin": 10.6146,
"WBGTmean": 12.1394,
"WBGTmax": 14.3354,
"WBGTmaxSun": null,
"UTCImin": 11.8356,
"UTCImean": 14.1294,
"UTCImax": 17.2034,
"HImin": 10.57,
"HImean": 13.1527,
"HImax": 16.7052
},
{
"Year": 1980,
"Month": 4,
"Tmin": 9.37931,
"Tmean": 12.9241,
"Tmax": 16.2759,
"Td": 8.23148,
"RHmean": 74.3115,
"RHmax": 59.5891,
"WBGTmin": 9.04303,
"WBGTmean": 11.2406,
"WBGTmax": 13.2503,
"WBGTmaxSun": null,
"UTCImin": 10.0756,
"UTCImean": 13.2498,
"UTCImax": 16.0892,
"HImin": 8.72126,
"HImean": 12.2128,
"HImax": 15.5158
},
{
"Year": 1980,
"Month": 5,
"Tmin": 8.07407,
"Tmean": 10.6399,
"Tmax": 14.4444,
"Td": null,
"RHmean": 76.2411,
"RHmax": 60.2131,
"WBGTmin": 7.57442,
"WBGTmean": null,
"WBGTmax": null,
"WBGTmaxSun": null,
"UTCImin": 8.70486,
"UTCImean": null,
"UTCImax": null,
"HImin": 7.28312,
"HImean": 9.75634,
"HImax": 13.4938
},
{
"Year": 1980,
"Month": 7,
"Tmin": 3.87097,
"Tmean": 6.74194,
"Tmax": 10.8065,
"Td": 2.06452,
"RHmean": 72.9362,
"RHmax": 55.8054,
"WBGTmin": 3.4279,
"WBGTmean": 5.32629,
"WBGTmax": 8.05513,
"WBGTmaxSun": null,
"UTCImin": 4.16556,
"UTCImean": 6.88706,
"UTCImax": 10.5796,
"HImin": 2.5963,
"HImean": 5.3759,
"HImax": 9.3998
},
{
"Year": 1980,
"Month": 9,
"Tmin": 6.23333,
"Tmean": 8.97223,
"Tmax": 11.6,
"Td": 6.1037,
"RHmean": 82.351,
"RHmax": 69.5854,
"WBGTmin": 6.31845,
"WBGTmean": 8.00618,
"WBGTmax": 9.71308,
"WBGTmaxSun": null,
"UTCImin": 6.92209,
"UTCImean": 9.45113,
"UTCImax": 11.7794,
"HImin": 5.4295,
"HImean": 8.07536,
"HImax": 10.6328
},
{
"Year": 1980,
"Month": 10,
"Tmin": 8.43333,
"Tmean": 11.2852,
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"RHmean": 78.9403,
"RHmax": 67.924,
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"WBGTmean": 10.0097,
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"WBGTmaxSun": null,
"UTCImin": 9.19437,
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"HImin": 7.76501,
"HImean": 10.5307,
"HImax": 12.863
},
{
"Year": 1981,
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},
{
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"HImin": 10.6675,
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"HImax": 17.8426
},
{
"Year": 1981,
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"Tmin": 12.0741,
"Tmean": 14.5041,
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"RHmax": 72.0491,
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"UTCImax": 17.8944,
"HImin": 11.8769,
"HImean": 14.2698,
"HImax": 17.2081
},
{
"Year": 1981,
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"Tmin": 12.4074,
"Tmean": 15.4167,
"Tmax": 18.2593,
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"RHmean": 83.9611,
"RHmax": 70.3348,
"WBGTmin": 12.668,
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"UTCImin": 13.5998,
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"HImin": 12.2142,
"HImean": 15.2067,
"HImax": 17.9783
},
{
"Year": 1981,
"Month": 4,
"Tmin": 10,
"Tmean": 12.7361,
"Tmax": 15.8571,
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"RHmean": 82.5259,
"RHmax": 67.9274,
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"UTCImax": 15.999,
"HImin": 9.51275,
"HImean": 12.2205,
"HImax": 15.2729
},
{
"Year": 1981,
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"Tmin": 7.77419,
"Tmean": 10.0627,
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"HImin": 6.89413,
"HImean": 9.10776,
"HImax": 12.6245
},
{
"Year": 1981,
"Month": 7,
"Tmin": 4.9,
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"HImax": 9.05522
},
{
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"Tmin": 4.45161,
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"Tmax": 11.871,
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"HImin": 2.9492,
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"HImax": 10.352
},
{
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"Month": 9,
"Tmin": 4.2,
"Tmean": 8.3537,
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},
{
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"HImin": 6.74846,
"HImean": 10.2892,
"HImax": 12.8542
},
{
"Year": 1981,
"Month": 11,
"Tmin": 10.1379,
"Tmean": 13.2088,
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"RHmax": 67.215,
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"UTCImax": 16.1454,
"HImin": 9.6793,
"HImean": 12.6796,
"HImax": 15.4494
},
{
"Year": 1981,
"Month": 12,
"Tmin": 12.3262,
"Tmean": 14.8907,
"Tmax": 17.3871,
"Td": 11.7276,
"RHmean": 81.5082,
"RHmax": 69.7501,
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"HImean": 14.5641,
"HImax": 17.0036
},
{
"Year": 1982,
"Month": 0,
"Tmin": 7.17557,
"Tmean": 11.1063,
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"HImax": 14.0271
},
{
"Year": 1982,
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"Tmin": 10.3389,
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"HImax": 16.9704
},
{
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"Tmin": 12.248,
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"HImin": 12.0642,
"HImean": 15.1036,
"HImax": 18.6068
},
{
"Year": 1982,
"Month": 3,
"Tmin": 10.6264,
"Tmean": 14.567,
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"RHmean": 77.2457,
"RHmax": 61.7686,
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"UTCImax": 18.1618,
"HImin": 10.2382,
"HImean": 14.0968,
"HImax": 17.7203
},
{
"Year": 1982,
"Month": 4,
"Tmin": 8.28927,
"Tmean": 12.3774,
"Tmax": 16.6935,
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"RHmean": 71.6036,
"RHmax": 54.429,
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"HImax": 15.8404
},
{
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"Month": 5,
"Tmin": 6.78927,
"Tmean": 10.3755,
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"HImin": 5.98517,
"HImean": 9.52347,
"HImax": 13.389
},
{
"Year": 1982,
"Month": 6,
"Tmin": 4.53704,
"Tmean": 8.02778,
"Tmax": 12.8556,
"Td": 1.36296,
"RHmean": 63.9868,
"RHmax": 46.6503,
"WBGTmin": 3.75934,
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"WBGTmax": 9.27825,
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"UTCImin": 4.75433,
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"UTCImax": 12.3611,
"HImin": 3.1271,
"HImean": 6.55658,
"HImax": 11.4148
},
{
"Year": 1982,
"Month": 7,
"Tmin": 3.00896,
"Tmean": 6.69176,
"Tmax": 11.5233,
"Td": 0.281363,
"RHmean": 65.0132,
"RHmax": 47.4322,
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"HImin": 1.4728,
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"HImax": 9.96959
},
{
"Year": 1982,
"Month": 8,
"Tmin": 3.89074,
"Tmean": 8.25926,
"Tmax": 11.8352,
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"RHmean": 78.8587,
"RHmax": 62.6882,
"WBGTmin": 4.70963,
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"UTCImin": 4.53797,
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"UTCImax": 11.8118,
"HImin": 2.82464,
"HImean": 7.1998,
"HImax": 10.7114
},
{
"Year": 1982,
"Month": 9,
"Tmin": 5.52778,
"Tmean": 9.90556,
"Tmax": 13.4352,
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"RHmean": 76.7366,
"RHmax": 61.2182,
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"WBGTmaxSun": 12.2543,
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"UTCImax": 13.3514,
"HImin": 4.66327,
"HImean": 8.95547,
"HImax": 12.4332
},
{
"Year": 1982,
"Month": 10,
"Tmin": 4.80159,
"Tmean": 10.1171,
"Tmax": 13.8651,
"Td": 4.42659,
"RHmean": 70.1723,
"RHmax": 55.4714,
"WBGTmin": 5.06719,
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"WBGTmax": 10.719,
"WBGTmaxSun": 12.5867,
"UTCImin": 5.37704,
"UTCImean": 10.2803,
"UTCImax": 13.5843,
"HImin": 3.73974,
"HImean": 9.01666,
"HImax": 12.756
},
{
"Year": 1982,
"Month": 11,
"Tmin": 8.21839,
"Tmean": 11.5766,
"Tmax": 14.4866,
"Td": 7.87931,
"RHmean": 78.7804,
"RHmax": 65.8273,
"WBGTmin": 8.29848,
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"WBGTmax": 12.1182,
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"UTCImin": 9.03572,
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"UTCImax": 14.5568,
"HImin": 7.56246,
"HImean": 10.8471,
"HImax": 13.7102
},
{
"Year": 1982,
"Month": 12,
"Tmin": 8.25269,
"Tmean": 12.2079,
"Tmax": 15.5358,
"Td": 8.49641,
"RHmean": 78.2601,
"RHmax": 63.4765,
"WBGTmin": 8.53918,
"WBGTmean": 10.8732,
"WBGTmax": 12.944,
"WBGTmaxSun": 15.445,
"UTCImin": 9.14154,
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"UTCImax": 15.5241,
"HImin": 7.67627,
"HImean": 11.528,
"HImax": 14.8032
}
];
const initialVals = {avg: 0, n: 0};
const tempTypes = ["Tmin", "Tmean", "Tmax","Td", "RHmean", "RHmax", "WBGTmin", "WBGTmean", "WBGTmax","WBGTmaxSun", "UTCImin", "UTCImean", "UTCImax", "HImin", "HImean", "HImax"];
for (var m = 0; m < 13; m )
{
for (var t = 0; t < tempTypes.length; t )
{
var avgx = array1
.filter((x) => {
return x.Month === m;
})
.map(function(obj) {return obj[tempTypes[t]]})
.reduce(averageCalcs, initialVals).avg;
console.log(tempTypes[t] ": Month: " m " : " avgx);
}
}
function averageCalcs({avg, n}, tempInfo) {
if (tempInfo == null) {
return {avg, n};
}
return {
avg: (tempInfo n * avg) / (n 1),
n: n 1,
};
}