3dTproject filter type

What sort of filter does 3dTproject employ for band/high/low pass filtering? I was unable to find any specifics in the documentation, and I’m looking to cite it in a publication.


I am interested in the same information. We are considering implementing 3dTproject in our data analysis, and knowledge of the filter type would help us a lot in our understanding before the implementation.

Thanks a lot,
Pallab K Bhattacharyya

It forms the sin() and cos() regressors in the rejected bands, and those are included in the matrix whose columns are to be projected out of the dataset. This method isn’t a “filter” in the sense of “Butterworth” or other time-domain FIR or IIR types of objects with which you might be familiar.

Does InstaCorr use the same method in the Bandpass option?