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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

1.3-9

License

GPL-2

Issues

Pull Requests

Stars

Forks

Repository

https://github.com/ClaraHapp/funData

Maintainer

Clara Happ-Kurz

Last Published

February 14th, 2024

Functions in funData (1.3-9)

dimSupp,multiFunData-method

dimSupp for multiFunData objects

autoplot.funData

Visualize functional data objects using ggplot

Add Gaussian white noise to functional data objects

approxNA,funData-method

approxNA for funData objects

as.irregFunData

Coerce a funData object to class irregFunData

as.multiFunData

Coerce a funData object to class multiFunData

Generate orthonormal eigenfunctions

Generic method for scalar products, based on integrate

extractObs,multiFunData-method

extractObs for multiFunData objects

extractObs,funData-method

extractObs for funData objects

Function to expand integers to a grid of indices

dimSupp,funData-method

dimSupp for funData objects

extractObs,irregFunData-method

extractObs for irregular functional data

Generate a sequence of simulated eigenvalues

Integrate a function on a rectangular 3D grid

flipFuns,irregFunData,irregFunData-method

Flip irregular functional data - irregFunData as reference

Calculate the first M Fourier basis functions

A class for (univariate) functional data

irregFunData-class

A class for irregularly sampled functional data

integrate,irregFunData-method

Integrate method for irregular functional data objects

flipFuns,funData,irregFunData-method

Flip irregular functional data - funData as reference

integrate,funData-method

Integrate method for funData objects

Coerce a funData object to class multiFunData

meanFunction,irregFunData-method

Mean for irregular functional data

meanFunction,funData-method

Mean for functional data

irregFunData-setAs

Coerce an irregFunData object to class funData

Coerce an irregFunData object to class funData

argvals,funData-method

Get argvals slot for funData objects

as.data.frame.funData

Coerce functional data objects to a data.frame

Extract observations of functional data

Calculate the norm for univariate functional data

norm.irregFunData

Calculate the norm for irregular functional data

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

nObsPoints,funData-method

nObsPoints for funData objects

scalarProduct,funData,irregFunData-method

Scalar product for irregular and functional data

nObsPoints,irregFunData-method

nObsPoints for irregular functional data objects

plot.irregFunData

Plotting irregular functional data

Plotting univariate functional data

Get the number of observation points

Flip functional data objects

extrapolateIrreg

Extrapolate irregular functional data to a given domain

meanFunction,multiFunData-method

Mean for multivariate functional data

flipFuns,multiFunData,multiFunData-method

Flip multivariate functional data

Convert a funData object to fd

nObsPoints,multiFunData-method

nObsPoints for multiFunData objects

ggplot Graphics for Functional Data Objects

Get the number of observations

nObs,multiFunData-method

nObs for multiFunData objects

integrate,multiFunData-method

Integrate method for multiFunData objects

Calculate the first M eigenfunctions of the Wiener process

norm,multiFunData,missing-method

Calculate the norm for multivariate functional data

Calculate the norm of functional data

Simulate multivariate eigenfunctions based on weighted orthonormal bases

autoplot.irregFunData

Visualize irregular functional data objects using ggplot

Support dimension of functional data

Integrate functional data

nObs,funData-method

nObs for funData objects

sparsify,funData-method

sparsify for univariate functional data

Generate a sparse version of functional data objects

plot.multiFunData

Plotting multivariate functional data

nObs,irregFunData-method

nObs for irregular functional data objects

scalarProduct,irregFunData,funData-method

Scalar product for irregular and functional data

scalarProduct,irregFunData,irregFunData-method

Scalar product for irregular functional data

sparsify,multiFunData-method

sparsify for multivariate functional data

Calculate weights for numerical integration

Convert an fd object to funData

A print method for univariate functional data

flipFuns,funData,funData-method

Flip univariate functional data

simMultiFunData

Simulate multivariate functional data

tensorProduct,funData-method

Tensor product for functional data

Simulate multivariate eigenfunctions based on a split 'big' ONB

scalarProduct,multiFunData,multiFunData-method

Scalar product for multivariate functional data

Tensor product for univariate functions on one-dimensional domains

Mean for functional data

multiFunData-class

A class for multivariate functional data

print.irregFunData

A print method for irregular functional data

norm,funData,missing-method

Calculate the norm for univariate functional data

norm,irregFunData,missing-method

Calculate the norm for irregular functional data

Simulate univariate functional data

Calculate the scalar product for functional data objects

scalarProduct,funData,funData-method

Scalar product for functional data

Arithmetics for functional data objects

addError,funData-method

Add gaussian white noise to functional data

Mathematical operations for functional data objects

Approximate missing values for funData objects

argvals,irregFunData-method

Get argvals slot for irregular functional data objects

X,irregFunData-method

Get X slot for irregular functional data objects

X,multiFunData-method

Get X slot for multiFunData objects

X<-,funData-method

Set X slot for funData objects

argvals,multiFunData-method

Get argvals slot for multiFunData objects

X,funData-method

Get X slot for funData objects

argvals<-,irregFunData-method

Set argvals slot for irregular functional objects

addError,multiFunData-method

Add gaussian white noise to multivariate functional data

autoplot.multiFunData

Visualize multivariate functional data objects using ggplot

argvals<-,funData-method

Set argvals slot for funData objects

argvals<-,multiFunData-method

Set argvals slot for multiFunData objects

X<-,irregFunData-method

Set X slot for irregular functional data objects

Extract and set slots from functional data objects

X<-,multiFunData-method

Set X slot for multiFunData objects

dimSupp,irregFunData-method

dimSupp for irregular functional data objects