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Evaluate the sum of a set of functions in a functional data object.
# S3 method for fd sum(..., na.rm)
a functional data object with a single replication that contains the sum of the functions in the object fd.
fd
a functional data object to sum.
Not used.
mean.fd, std.fd, stddev.fd, center.fd
mean.fd
std.fd
stddev.fd
center.fd