std.fd {fda} | R Documentation |
Evaluate the standard deviation of a set of functions in a functional data object.
std.fd(fdobj)
fdobj |
a functional data object. |
a functional data object with a single replication
that contains the standard deviation of the one or several functions in
the object fdobj
.
stddev.fd, mean.fd, sum.fd, center.fd
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 ------- Lfdobj <- int2Lfd(4) lambda <- 1e-12 lipfdPar <- fdPar(lipbasis, Lfdobj, lambda) lipfd <- smooth.basis(liptime, lip, lipfdPar)$fd names(lipfd$fdnames) = c("Normalized time", "Replications", "mm") lipstdfd <- std.fd(lipfd) plot(lipstdfd)