Computes cosine of the angle between velocity vectors, possibly with a lag, for two people moving simultaneously in 3D. The methods are described in Reiss, Gvirts, et al., "A timevarying measure of dyadic synchrony for threedimensional motion."
Package details 


Author  Philip T. Reiss 
Maintainer  Philip T. Reiss <reiss@stat.haifa.ac.il> 
License  GPL3 
Version  0.1 
Package repository  View on GitHub 
Installation 
Install the latest version of this package by entering the following in R:

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