Cv.warping		Cross-validation for WARPing density estimation
Cvb.warping		Biased cross-validation for WARPing density estimation
G.Warpingreg		Cross-validation for WARPing regression
GS.Warping		Golden section bootstrap for WARPing regression
NW.Warping		Nadaraya-Watson non-parametric regression via WARPing
NW.kernel		Nadaraya-Watson non-parametric regression
Simul.conf.interval 	Simultaneous confidence intervals for WARPing regression
Simul.conf.plot		plot simultaneous confidence intervals for WARPing regression
frequency.polygon	Plots frequency polygon
histogram		Haerdle's histogram function
histogram.normal.ref	histogram with automatic binwidth
k.nn			k-nearest neighbour non-parametric regression
kde			kernel density estimation
kds.ci			Confidence intervals for kernel density estimates
ortho.series0.1		Orthogonal series estimator on [0,1]
warping			smoothed histogram by WARPing
warping.step		plot WARPing estimates as step functions
