https://github.com/cran/fda
Tip revision: 162fdbd4bc36e851c7abd22dd9b35cd24527f8e0 authored by J. O. Ramsay on 03 November 2009, 00:00:00 UTC
version 2.3.2
version 2.3.2
Tip revision: 162fdbd
mean.fd.Rd
\name{mean.fd}
\alias{mean.fd}
\title{
Mean of Functional Data
}
\description{
Evaluate the mean of a set of functions in a functional data object.
}
\usage{
\method{mean}{fd}(x, ...)
}
\arguments{
\item{x}{
a functional data object.
}
\item{...}{Other arguments to match the generic function for 'mean'}
}
\value{
a functional data object with a single replication
that contains the mean of the functions in the object \code{fd}.
}
\seealso{
\code{\link{stddev.fd}},
\code{\link{var.fd}},
\code{\link{sum.fd}},
\code{\link{center.fd}}
\code{\link{mean}}
}
\examples{
##
## 1. univeriate: lip motion
##
liptime <- seq(0,1,.02)
liprange <- c(0,1)
# ------------- create the fd object -----------------
# use 31 order 6 splines so we can look at acceleration
nbasis <- 51
norder <- 6
lipbasis <- create.bspline.basis(liprange, nbasis, norder)
# ------------ apply some light smoothing to this object -------
lipLfdobj <- int2Lfd(4)
lipLambda <- 1e-12
lipfdPar <- fdPar(lipbasis, lipLfdobj, lipLambda)
lipfd <- smooth.basis(liptime, lip, lipfdPar)$fd
names(lipfd$fdnames) = c("Normalized time", "Replications", "mm")
lipmeanfd <- mean.fd(lipfd)
plot(lipmeanfd)
##
## 2. Trivariate: CanadianWeather
##
dayrng <- c(0, 365)
nbasis <- 51
norder <- 6
weatherBasis <- create.fourier.basis(dayrng, nbasis)
weather.fd <- smooth.basis(day.5, CanadianWeather$dailyAv,
weatherBasis)$fd
str(weather.fd.mean <- mean.fd(weather.fd))
}
% docclass is function
\keyword{smooth}