SqrtMeanInverse {fdasrvf}

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)

Arguments

gam

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

Value

gamI inverse of Karcher mean warping function

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)