graphMatrix {Vicus}

Graph Laplacian type matrix

Description

A symmetric matrix is returned.

Usage

graphMatrix(X, algorithm=c("Vicus", "LEM", "HLLE"),
  K=10, alpha=0.9, ndim=2)

Arguments

X

A numeric matrix (n times p).

algorithm

Algorithm to construct a graph matrix. Vicus matrix (Vicus), Graph Laplacian matrix (LEM), and Hessian Locally Linear Embedding matrix (HLLE) are available (Default: "Vicus").

K

The number of neighborhoods to construct a graph matrix (Default: 10).

alpha

An optional parameter for Vicus (Default: 0.9).

ndim

The number of lower dimension to embed the graph (Default: 2).

Value

M: A symmetric matrix (n times n). This matrix can be applied to embedding function. algorithm: algorithm parameter specified by argument ndim: ndim parameter specified by argument

Author(s)

Koki Tsuyuzaki

See Also

embedding

Examples

X <- matrix(runif(10*20), nrow=10, ncol=20)
str(graphMatrix(X, K=2), 2)