| elastic.distance {fdasrvf} | R Documentation |
This functions calculates the distances between functions, D_y and D_x, where function 1 is aligned to function 2
elastic.distance(f1, f2, time, lambda = 0)
f1 |
sample function 1 |
f2 |
sample function 2 |
time |
sample points of functions |
lambda |
controls amount of warping (default = 0) |
Returns a list containing
Dy |
amplitude distance |
Dx |
phase distance |
Srivastava, A., Wu, W., Kurtek, S., Klassen, E., Marron, J. S., May 2011. Registration of functional data using fisher-rao metric, arXiv:1103.3817v2 [math.ST].
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.
data("simu_data")
distances <- elastic.distance(simu_data$f[,1],simu_data$f[,2],simu_data$time)