# Vowel Covariation Tools

## Documentation for package ‘nzilbb.vowels’ version 0.4.1

- DESCRIPTION file.
- Package NEWS.

## Help Pages

correlation_test | Permutation test of pairwise correlations
lobanov_2 | Apply Lobanov 2.0 normalisation
mds_test | Test optimal number of MDS dimensions.
onze_intercepts | Speaker random intercepts from GAMMs for 100 ONZE speakers
onze_intercepts_full | Speaker random intercepts for 418 ONZE speakers
onze_vowels | Monophthong data for random sample of speakers from the ONZE corpus
onze_vowels_full | Monophthong data for speakers from the ONZE corpus
pca_contrib_plot | PCA contribution plots
pca_rotate_2d | Manually rotate two PCs around the origin
pca_rotate_procrustes | Apply Procrustes rotation to PCA loadings and scores.
pca_test | PCA with confidence intervals and null distributions
pc_flip | Flip PC loadings
permutation_test | Run permutation test on PCA analysis.
plot_correlation_counts | Plot of correlation counts from 'correlation_test' object
plot_correlation_magnitudes | Plot distribution of correlations from 'correlation_test' object
plot_loadings | Plot PC index loadings from 'pca_test' object.
plot_mds_test | Plot 'mds_test()' results
plot_pc_input | Plot Scores from Significant PCs Against PCA Input
plot_pc_vs | Plot PC loadings in vowel space
plot_permutation_test | Create plot from 'permutation_test()'.
plot_procrustes_loadings | Plot loadings with confidence bands from 'procrustes_loadings()'
plot_variance_explained | Create plot of variances explained from 'pca_test' object
plot_vowel_space | Plot vowel space for speaker or speakers.
procrustes_loadings | Generate distribution of (index) loadings using the bootstrap and Procrustes rotation.
qb_intervals | Formant and amplitude for intervals of QuakeBox monologues
qb_vowels | Formants from QuakeBox 1
sim_matrix | Similarity matrix from online perception test.
summary.correlation_test | Summary function for correlation test object. Set alpha to change significance level.