Changelog • nzilbb.vowels

nzilbb.vowels 0.4.1

Remove VignetteBuilder from DRESCRIPTION.
Now plot_procrustes_loadings() correctly sets the y-axis label to ‘Loading’ or ‘Index loading’.

In mds_test(), first argument changed from similarity_matrix to dissimilarity_matrix to match the behaviour expected by users of smacof::smacofSym()

New pca_rotate_2d() takes the output of stats::prcomp() or stats::princomp() and rotates two specified PCs clockwise by angle degrees. Both scores and loadings are rotated and the variance explained by each component is updates.
New pca_rotate_procrustes() allows Procrustes rotation of the output of prcomp() or princomp() to match a target configuration of either scores or loadings. Partial overlap of variables is enabled by rotation_variables. Both scores and loadings are rotated and the variance explained by each component is updates.
New procrustes_loadings() generates data to enable calculation of confidence intervals of loadings, or confidence intervals and null distributions of index loadings, by bootstrapping, permutation, and Procrustes rotation.
New plot_procrustes_loadings() provided to plot the output of procrustes_loadings().
New articles on package website https://nzilbb.github.io/nzilbb_vowels/ covering the ‘model-to-PCA’ workflow used at NZILBB and the use of rotation with PCA.

CRAN release: 2024-11-29

Initial submission to CRAN
mds_test() and plot_mds_test() added to determine number of dimensions for MDS.
pc_flip() added to reverse orientation of selected PCs in PCA analysis.