# fdata.methods

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##### fdata S3 Group Generic Functions

fdata Group generic methods defined for four specified groups of functions, Math, Ops, Summary and Complex.

order.fdata and split.fdata: A wrapper for the order and split function for fdata object.

Keywords
math, Descriptive
##### Usage
# S3 method for fdata
Math(x, ...)# S3 method for fdata
Ops(e1, e2 = NULL)# S3 method for fdata
Summary(..., na.rm = FALSE)# S3 method for fdata
split(x, f, drop = FALSE, ...)order.fdata(y, fdataobj, na.last = TRUE, decreasing = FALSE)is.fdata(fdataobj)
##### Arguments
x

An fdata object containing values to be divided into groups or an list of fdata objects containing values to be combine by rows in a to be flatten one fdata object.

Further arguments passed to methods.

e1, e2

fdata class object

na.rm

logical: should missing values be removed?

f

a factor in the sense that as.factor(f) defines the grouping, or a list of such factors in which case their interaction is used for the grouping.

drop

logical indicating if levels that do not occur should be dropped (if f is a factor or a list).

y

A sequence of numeric, complex, character or logical vectors, all of the same length, or a classed R object.

fdataobj

fdata class object.

na.last

for controlling the treatment of NAs. If TRUE, missing values in the data are put last; if FALSE, they are put first; if NA, they are removed; if "keep" they are kept with rank NA.

decreasing

logical Should the sort order be increasing or decreasing?.

##### Details

In order.fdata the funcional data is ordered w.r.t the sample order of the values of vector.

split.fdata divides the data in the fdata object x into the groups defined by f.

##### Value

• split.fdata: The value returned from split is a list of fdata objects containing the values for the groups. The components of the list are named by the levels of f (after converting to a factor, or if already a factor and drop = TRUE, dropping unused levels).\

• order.fdata: returns the functional data fdataobj w.r.t. a permutation which rearranges its first argument into ascending or descending order.

See Summary and Complex.

##### Aliases
• fdata.methods
• Math.fdata
• Ops.fdata
• Summary.fdata
• split.fdata
• order.fdata
• is.fdata
##### Examples
# NOT RUN {
data(tecator)
absor<-tecator\$absorp.fdata
absor2<-fdata.deriv(absor,1)
absor<-absor2[1:5,1:4]
absor2<-absor2[1:5,1:4]
sum(absor)
round(absor,4)
log1<-log(absor)

fdataobj<-fdata(MontrealTemp)
fac<-factor(c(rep(1,len=17),rep(2,len=17)))
a1<-split(fdataobj,fac)
dim(a1[]);dim(a1[])
# }
# NOT RUN {
# }

Documentation reproduced from package fda.usc, version 2.0.1, License: GPL-2

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