flipSigns

Compares column directions of two loading matrices and returns a diagonal matrix
of +1/-1 signs. If the angle between corresponding columns exceeds 90 degrees,
the sign is -1 (flip), otherwise +1 (keep). Input dot products are clamped to
[-1, 1] before <code>acos</code> to avoid NaN from floating-point overshoot.

internal

Implements Procrustes cross-validation method for Principal Component Analysis, Principal Component Regression and Partial Least Squares regression models. S. Kucheryavskiy (2023) <doi:10.1016/j.aca.2023.341096>.

Sergey Kucheryavskiy

Procrustes Cross-Validation

flipSigns function

<dl><dt>V1</dt>
<dd>matrix with reference vectors as columns (e.g. global loadings)</dd>
<dt>V2</dt>
<dd>matrix with vectors to align as columns (e.g. local loadings)</dd></dl>

Arguments

Compute sign-flip diagonal matrix for direction correction of local loadings — flipSigns

<dl>

<dt>V1</dt>
<dd>matrix with reference vectors as columns (e.g. global loadings)</dd>


<dt>V2</dt>
<dd>matrix with vectors to align as columns (e.g. local loadings)</dd>

</dl>

flipSigns: Compute sign-flip diagonal matrix for direction correction of local loadings

Description

Usage

Value

Arguments