ppclp2D: 2D prbabilistic principal curve with length penalty

In CHuanSite/ppclp: Probabilistic Principal Curve with Length Penalty

Description

This function applies the probabilistic principal curve algorithm with length penalty

Usage

ppclp2D(x, y, x_fix, y_fix, K = 50, degree_free = 10, lambda = 0.5,
  T = 100)

Arguments

x	The coordinate of the x axis
y	The coordinate of the y axis
x_fix	The cordinate of the starting point of the curve
y_fix	The coordinate of the ending point of the curve
K	the number of knots of the curve
degree_free	the degree of freedom of the B spline
lambda	The magnitude value added to the length penalty
T	The total number of iterations to do the EM algorithm

Examples

data("threeExample")
tmpCurve = ppclp2D(threeExample$x, threeExample$y, threeExample$xFix, threeExample$yFix)
plot(threeExample$x, threeExample$y, xlim = c(0,1), ylim = c(0,1), pch = 16, cex = 0.8)
lines(tmpCurve$xFit, tmpCurve$yFit, type = "l", col = "red", lwd = 5)

CHuanSite/ppclp documentation built on May 8, 2021, 3:21 a.m.