Center Functional Data
Center Functional Data
DESCRIPTION:
Subtract the pointwise mean from each of the functions
in a functional data object; that is, to center them on the mean function.
USAGE:
center.fd(fd)
REQUIRED ARGUMENTS:
- fd
-
A functional data object.
VALUE:
Returns a functional data object with same dimensions as fd
that contains the centered versions of the functions in the object fd.
SEE ALSO:
sum.fd, mean.fd, std.fd
EXAMPLES:
# ----- make temperature fd object, don't smooth
tempfd <- data2fd(tempmat, monthtime, monthbasisfd)
# ---------- center and plot the temperature data
tempcenterfd <- center.fd(tempfd)
par(mfrow=c(1,1),pty="m")
plot(tempcenterfd, xlab="Months", ylab="Deg. C",
main="Centered Temperature")