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Splinets (version 1.5.0)

Functional Data Analysis using Splines and Orthogonal Spline Bases

Description

Splines are efficiently represented through their Taylor expansion at the knots. The representation accounts for the support sets and is thus suitable for sparse functional data. Two cases of boundary conditions are considered: zero-boundary or periodic-boundary for all derivatives except the last. The periodical splines are represented graphically using polar coordinates. The B-splines and orthogonal bases of splines that reside on small total support are implemented. The orthogonal bases are referred to as 'splinets' and are utilized for functional data analysis. Random spline generator is implemented as well as all fundamental algebraic and calculus operations on splines. The optimal, in the least square sense, functional fit by 'splinets' to data consisting of sampled values of functions as well as splines build over another set of knots is obtained and used for functional data analysis. , , .

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Version

Install

install.packages('Splinets')

Monthly Downloads

335

Version

1.5.0

License

GPL (>= 2)

Maintainer

Krzysztof Podgorski

Last Published

March 6th, 2023

Functions in Splinets (1.5.0)

Splinets-class

The class to represent a collection of splines
gramian

Gramian matrix, norms, and inner products of splines
is.splinets,Splinets-method

Diagnostics of splines
evspline

Evaluating splines at given arguments.
gather

Combining two Splinets objects
dintegra

Calculating the definite integral of a spline.
integra

Indefinite integrals of splines
deriva

Derivatives of splines
construct

Construction of a Splinets object
exsupp

Correcting support sets and reshaping the matrix of derivatives at the knots.
project

Projecting into spline spaces
refine

Refining splines through adding knots
seq2dyad

Organizing indices in a spline basis in the net form
rspline

Random splines
is.splinets

Diagnostics of splines and their generic correction
lincomb

Linear transformation of splines.
lines,Splinets-method

Adding graphs of splines to a plot
plot,Splinets-method

Plotting splines
truck

Data on truck responses to a rough road profile
wind

Data on wind direction and speed.
splinet

B-splines, periodic B-splines and their orthogonalization
subsample

Subsampling from a set of splines
sym2one

Switching between representations of the matrices of derivatives
tire

Data on tire responses to a rough road profile