Average of Numbers in Javascript/Angularjs

Question

I have a json response where have to calculate the average of "throughput_kbps" where protocol name is "TCP" for each result array.

I using Javascript/Angularjs for this

Please refer This json

Thanx in advance

filter the results for "TCP", pluck the throughput_kbps of that set, sum the set, divide by the count of the set. — dandavis
– dandavis, Commented Mar 3, 2016 at 6:31
fetch("https://raw.githubusercontent.com/openstack/vmtp/master/doc/source/_static/example.json") .then(x=>x.json()).then(x=>x.flows.map(y=>y.results.filter(k=>k.protocol=="TCP"))) .then(r=>r.reduce((a,b)=>a.concat(b))) .then(x=>[x.length,x.map(y=>y.throughput_kbps)]) .then(x=>[x[0], x[1].reduce((a,b)=>+a+ +b)]) .then(r=>r[1]/r[0]) .then(alert) — dandavis
– dandavis, Commented Mar 3, 2016 at 6:42

asalic · Accepted Answer · 2016-03-03 06:44:13Z

2

You could do something like this:

var len1 = obj['flows'].length;
for (var i=0; i<len1; i++) 
{
   var tmp = obj.['flows'][i];
   var len2 = tmp.['results'].length;
   var mean = 0;
   for (var j=0; j<len2; ++j)
   {
      var tmpResult = tmp.['results'][j];
      if (tmpResult['protocol'] === 'TCP')
         mean += tmpResult['throughput_kbps'];
   }
   console.log(mean);
}

answered Mar 3, 2016 at 6:44

asalic

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user1846747 · Accepted Answer · 2016-03-03 06:55:54Z

1

Try this

var sum = 0;
var count = 0;

data.flows.map(function(d){
    return d.results.filter(function(res){
        if(res.protocol == 'TCP'){
            sum += res.throughput_kbps;
            count++;
            return sum;
        }
    })
});

var avg = sum/count;

answered Mar 3, 2016 at 6:55

user1846747

Comments

ChandrasekarG · Accepted Answer · 2016-03-03 07:02:34Z

0

Pass your JSON as an argument to this function. This'll return you the average throughput you ask for.

function calculateThroughput(json){
 var flowsObj = json.flows;
 var throughputSum = 0;
 var noOfSamples = 0;

 for(noOfFlows in flowsObj){
    var resultObj = flowsObj[noOfFlows].results;
    for(noOfResults in resultObj){
        if(resultObj[noOfResults].protocol == "TCP"){
            throughputSum += resultObj[noOfResults].throughput_kbps;
            noOfSamples++;
        }
    }
 }
 return (throughputSum/noOfSamples);
};

Hope this helps.

answered Mar 3, 2016 at 7:02

ChandrasekarG

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