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funData

funData is an R-package that allows users to easily handle functional data. The data is stored in an object-oriented manner using S4 classes and methods.

Highlights

funData provides a unified framework for different types of functional data:

Univariate and multivariate data
Regularly and irregularly sampled data
Data with one-, two- (images) and even higher-dimensional domains

Important functionalities include:

Displaying, Plotting, including an interface to ggplot2
Subsetting (samples, domain)
Basic arithmetics and averaging
Integration over the domain
A fully integrated simulation toolbox

Installation

The funData package is available on CRAN. To install the latest version directly from Github, please use devtools::install_github("ClaraHapp/funData") (install devtools before).

Dependencies

The funData package depends on the R-packages fields, foreach, abind and methods.

References

The functionalities of the funData package and its interplay with the MFPCA package for multivariate functional principal component analysis are described in:

C. Happ-Kurz (2020): Object-Oriented Software for Functional Data. Journal of Statistical Software, 93(5): 1-38 .

Bug reports

Please use GitHub issues for reporting bugs or issues.

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Version

Install

install.packages('funData')

Monthly Downloads

585

Version

1.3-8

License

GPL-2

Issues

Pull Requests

Stars

Forks

Repository

https://github.com/ClaraHapp/funData

Maintainer

Clara Happ-Kurz

Last Published

October 17th, 2021

Functions in funData (1.3-8)

argvals,funData-method

Get argvals slot for funData objects

autoplot.multiFunData

Visualize multivariate functional data objects using ggplot

Approximate missing values for funData objects

Arithmetics for functional data objects

X,irregFunData-method

Get X slot for irregular functional data objects

X,funData-method

Get X slot for funData objects

argvals<-,irregFunData-method

Set argvals slot for irregular functional objects

argvals<-,funData-method

Set argvals slot for funData objects

as.irregFunData

Coerce a funData object to class irregFunData

Add Gaussian white noise to functional data objects

argvals,irregFunData-method

Get argvals slot for irregular functional data objects

approxNA,funData-method

approxNA for funData objects

dimSupp,multiFunData-method

dimSupp for multiFunData objects

Function to expand integers to a grid of indices

extractObs,funData-method

extractObs for funData objects

dimSupp,irregFunData-method

dimSupp for irregular functional data objects

Extract observations of functional data

argvals,multiFunData-method

Get argvals slot for multiFunData objects

Mathematical operations for functional data objects

argvals<-,multiFunData-method

Set argvals slot for multiFunData objects

Support dimension of functional data

as.multiFunData

Coerce a funData object to class multiFunData

autoplot.funData

Visualize functional data objects using ggplot

extrapolateIrreg

Extrapolate irregular functional data to a given domain

autoplot.irregFunData

Visualize irregular functional data objects using ggplot

Calculate weights for numerical integration

integrate,irregFunData-method

Integrate method for irregular functional data objects

extractObs,irregFunData-method

extractObs for irregular functional data

addError,funData-method

Add gaussian white noise to functional data

Extract and set slots from functional data objects

extractObs,multiFunData-method

extractObs for multiFunData objects

Generic method for scalar products, based on integrate

addError,multiFunData-method

Add gaussian white noise to multivariate functional data

as.data.frame.funData

Coerce functional data objects to a data.frame

Coerce an irregFunData object to class funData

meanFunction,funData-method

Mean for functional data

Generate a sequence of simulated eigenvalues

flipFuns,funData,irregFunData-method

Flip irregular functional data - funData as reference

Legendre Polynomials of degree 0,...,M-1

irregFunData-setAs

Coerce an irregFunData object to class funData

nObsPoints,irregFunData-method

nObsPoints for irregular functional data objects

Calculate the first M Fourier basis functions

irregFunData-class

A class for irregularly sampled functional data

integrate,multiFunData-method

Integrate method for multiFunData objects

dimSupp,funData-method

dimSupp for funData objects

Generate orthonormal eigenfunctions

flipFuns,multiFunData,multiFunData-method

Flip multivariate functional data

Get the number of observations

Integrate functional data

irregFunData-constructor

Constructor for irregular functional data objects

Integrate a function on a rectangular 3D grid

sparsify,funData-method

sparsify for univariate functional data

flipFuns,irregFunData,irregFunData-method

Flip irregular functional data - irregFunData as reference

nObsPoints,funData-method

nObsPoints for funData objects

Flip functional data objects

sparsify,multiFunData-method

sparsify for multivariate functional data

Convert a funData object to fd

Coerce a funData object to class multiFunData

Calculate the norm of functional data

nObsPoints,multiFunData-method

nObsPoints for multiFunData objects

meanFunction,multiFunData-method

Mean for multivariate functional data

norm,multiFunData,missing-method

Calculate the norm for multivariate functional data

meanFunction,irregFunData-method

Mean for irregular functional data

norm,irregFunData,missing-method

Calculate the norm for irregular functional data

Calculate the first M eigenfunctions of the Wiener process

Calculate the norm for univariate functional data

Simulate multivariate eigenfunctions based on a split 'big' ONB

flipFuns,funData,funData-method

Flip univariate functional data

norm.irregFunData

Calculate the norm for irregular functional data

Convert an fd object to funData

A class for (univariate) functional data

ggplot Graphics for Functional Data Objects

multiFunData-constructor

Constructor for multivariate functional data objects

nObs,funData-method

nObs for funData objects

scalarProduct,funData,funData-method

Scalar product for functional data

integrate,funData-method

Integrate method for funData objects

Plotting univariate functional data

Simulate univariate functional data

simMultiFunData

Simulate multivariate functional data

funData-constructor

Constructor for functional data objects, first argument (argvals) passed as list or vector of numerics

scalarProduct,funData,irregFunData-method

Scalar product for irregular and functional data

scalarProduct,irregFunData,funData-method

Scalar product for irregular and functional data

Simulate multivariate eigenfunctions based on weighted orthonormal bases

Tensor product for univariate functions on one-dimensional domains

multiFunData-class

A class for multivariate functional data

Mean for functional data

nObs,irregFunData-method

nObs for irregular functional data objects

Get the number of observation points

plot.irregFunData

Plotting irregular functional data

plot.multiFunData

Plotting multivariate functional data

norm,funData,missing-method

Calculate the norm for univariate functional data

A print method for univariate functional data

print.irregFunData

A print method for irregular functional data

Calculate the scalar product for functional data objects

nObs,multiFunData-method

nObs for multiFunData objects

scalarProduct,multiFunData,multiFunData-method

Scalar product for multivariate functional data

scalarProduct,irregFunData,irregFunData-method

Scalar product for irregular functional data

Generate a sparse version of functional data objects

tensorProduct,funData-method

Tensor product for functional data

X,multiFunData-method

Get X slot for multiFunData objects

X<-,multiFunData-method

Set X slot for multiFunData objects

X<-,funData-method

Set X slot for funData objects

X<-,irregFunData-method

Set X slot for irregular functional data objects