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spherepc (version 0.1.2)

Spherical Principal Curves

Description

Fitting a principal curve to data lying in the spherical surface. This package provides principal circle, principal geodesic analysis, Hauberg's principal curves, and spherical principal curves. Moreover, it partially offers locally defined principal geodesics which are currently under study. The detailed procedure is described in Jang-Hyun Kim, Jongmin Lee and Hee-Seok Oh (2020) .

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Version

Install

install.packages('spherepc')

Monthly Downloads

214

Version

0.1.2

License

GPL (>= 3)

Maintainer

Jongmin Lee

Last Published

March 24th, 2020

Functions in spherepc (0.1.2)

Dist.pt

The number of distinct points.
PGA

Principal geodesic analysis
Proj.Hauberg

Projecting the nearest point
Expmap

Exponential map
ExtrinsicMean

Finding Extrinsic Mean
Kernel.Gaussian

Gaussian kernel function
Earthquake

Earthquake
Kernel.indicator

Indicator kernel function
LPG

Local principal geodesics
IntrinsicMean

Finding Intrinsic Mean
Kernel.quartic

Quartic kernel function
Cal.recon

Calculating reconstruction error
GenerateCircle

Generating circle on sphere
PrincipalCircle

Principal circle on sphere
Crossprod

Crossproduct of vectors
SPC

Spherical principal curves
Trans.Euclid

Transforming into Euclidean coordinate
Rotate

Rotating point on sphere
Rotate.inv

Rotating point on sphere
SPC.Hauberg

principal curves by Hauberg on the sphere
Trans.sph

Transforming into spherical coordinate
Logmap

Logarithm map