bases: Create random bases

In cepp: Context Driven Exploratory Projection Pursuit

Description

Generate bases.

Usage

basis_random(n, d = 2)
basis_nearby(alpha = 0.75, method = 'geodesic', d = 2)

Arguments

n	The number of rows.
d	The number of columns.
alpha	How "far" away should the new matrix be generated?
method	How should be new matrix be found? One of linear or geodesic.

Details

basis_random returns a new orthonormal matrix of specified dimensions.

basis_nearby generates a function. Calling this function with a matrix, hybridizes it with a new (randomly generated via basis_random) orthonormal matrix, and returns it.

Value

For basis_random, a random orthonormal matrix of specified dimensions.

For basis_nearby, a function that can be used to generate new matrices "near" the current matrix.

Author(s)

Both functions were originally taken from the tourr package. The basis_nearby function was modified so the parameters alpha and method can be set more conveniently during optimization.

cepp documentation built on May 2, 2019, 3:44 p.m.