Strange (bad) behavior on indexOfOutliers

[andrewjaykeller]

Testing your package pre deployment... found error:

var stats = require("stats-analysis");
var myArray = [5000,4900,1000,3000,4400,1200300,5000,5500,126500];
var indexsToRemove = stats.indexOfOutliers(myArray);
console.log(indexsToRemove);

This logs:
[5,6,8]

Now 5 and 8, totally agree, but why would 6 be removed?

[alyssaq]

Hmm, strange. Ill take a look later today.

[alyssaq]

Oh right!!
The default outlier method uses medianDifferencing so a number is considered an outlier if the difference is higher than the median.
You'll want to use the other outlier method MAD that doesnt care about order.
stats.indexOfOutliers(arr, stats.outlierMethod.MAD)

I just pushed a new version so you'll have to npm install again.
Thanks for reporting this! 😄