Previously i have a post about getting the average value of a numeric array using ?Underscore.

• Javascript – Get average value of a numeric array using Underscore

If you need more statistical functions other than getting the mean value. You could try Simple Statistics.

Visit the above link and play with it. Here is an example on getting some common statistics value in Javascript.

// numbers from 1 to 100
var myData = [];
for (var i = 0; i < 99; i++) {
  myData[i] = i + 1;
}

ss.mean(myData);
ss.min(myData);
ss.quantile(myData , 0.2);

Done =)

Reference:

• Simple Statistics
• GitHub – tmcw/simple-statistics