fdasrvf (version 2.3.6)

SqrtMeanInverse: SRVF transform of warping functions

Description

This function calculates the srvf of warping functions with corresponding shooting vectors and finds the inverse of mean

Usage

SqrtMeanInverse(gam)

Value

gamI inverse of Karcher mean warping function

Arguments

gam

matrix (\(N\) x \(M\)) of \(M\) warping functions with \(N\) samples

References

Srivastava, A., Wu, W., Kurtek, S., Klassen, E., Marron, J. S., May 2011. Registration of functional data using fisher-rao metric, arXiv:1103.3817v2.

Tucker, J. D., Wu, W., Srivastava, A., Generative Models for Function Data using Phase and Amplitude Separation, Computational Statistics and Data Analysis (2012), 10.1016/j.csda.2012.12.001.

Examples

gamI <- SqrtMeanInverse(simu_warp$warping_functions)