followx: Fit an individual branch of a local principal curve.

In LPCM: Local Principal Curve Methods

Fit an individual branch of a local principal curve.

Description

Internal function of package LPCM called by lpc. Do not use!

Usage

followx(Xi, x0, h, t0, iter, way, weights, pen = 2, 
    lasteigenvector = 0, rho0 = 0.4, boundary=0.005,
    convergence.at= 0.000001, cross=TRUE)

Arguments

Xi	data matrix
x0	branch starting point
h	bandwidth
t0	step length
iter	number of iterations (within the given curve branch)
way	possible values "one", "two", "back" (in which directions the curve should proceed)
weights	vector of weights
pen	power used for angle penalization
lasteigenvector	to be passed on from lpc
rho0	constant; see reference [1] in lpc.control.
boundary	boundary correction, see Einbeck and Zayed (2014)
convergence.at	convergence parameter
cross	Boolean; are curves allowed to cross?

Author(s)

JE

References

Einbeck, J., & Zayed, M. (2014). Some asymptotics for localized principal components and curves. Communications in Statistics - Theory and Methods, 43(8), 1736-1749. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1080/03610926.2012.673676")}

See Also

lpc

LPCM documentation built on Sept. 11, 2024, 7:53 p.m.