The mathematics behind the "filloutliers" function

I've been trying to find the mathematics/theory behind the matlab filloutliers function, but could not find anything about it.

Does anyone know what the theory behind this function is, besides that it detects and replaces outliers?

[John D'Errico]

There are MULTIPLE methods listed in that function. A detailed exposition of what we think lies under the hood would take hours to write.

And though I don't see any references, the documentation does describe the various methods in some depth. I would suggest you carefully read what is in

doc filloutliers

Then if you have a specific question about one specific method, ask again.

[mootje_3000]

Lets considere "spline" as a "fill method" . The documentation says that it detects and replaces outliers by filling it using piecewise cubic spline interpolation. Does the function in this case delete the outliers and fills them accoring to a piecewise cubic spline interpolation, or does it also consider the value of these outliers?

[Walter Roberson]

It only considers the values of the non-outliers. The code that does the work is in toolbox/matlab/datafun/private/locateoutliers.m