row_rot

Takes i and k-th row of a matrix and rotate matrix by theta angle (requires matrix a to be 2*q matrix)

internal

This method generates a tour path by interpolating between d-D frames in p-D using Givens rotations. The algorithm arises from the problem of zeroing elements of a matrix. This interpolation method is useful for showing specific d-D frames in the tour, as opposed to d-D planes, as done by the geodesic interpolation. It is useful for projection pursuit indexes which are not s invariant. See more details in Buj, Cook, Asimov and Hurley (2005) <doi:10.1016/S0169-7161(04)24014-7> and Batsaikhan, Cook and Laa (2023) <doi:10.48550/arXiv.2311.08181>.

Di Cook

woylier

Alternative Tour Frame Interpolation Method

Zola Batsaikan

Dianne Cook

Ursula Laa

row_rot function

<dl><dt>a</dt>
<dd>matrix</dd>
<dt>i</dt>
<dd>row</dd>
<dt>k</dt>
<dd>row that we want to zero the element</dd>
<dt>theta</dt>
<dd>angle between them</dd></dl>

Arguments

Takes i and k-th row of a matrix and rotate matrix by theta angle (requires matrix a to be 2*q matrix) — row_rot

<dl>

<dt>a</dt>
<dd>matrix</dd>


<dt>i</dt>
<dd>row</dd>


<dt>k</dt>
<dd>row that we want to zero the element</dd>


<dt>theta</dt>
<dd>angle between them</dd>

</dl>

row_rot: Takes i and k-th row of a matrix and rotate matrix by theta angle (requires matrix a to be 2*q matrix)

Description

Usage

Value

Arguments