data(indoVowelData)
plotVowels(vowel=indo$vowel, f1=indo$f1, f2=indo$f2, grouping.factor=
indo$gender, norm.method='bark', match.unit=FALSE)
plotVowels(data=indo, vowel='vowel', f1='f1', f2='f2', grouping.factor=
'subj', single.plot=FALSE, match.axes='relative', points='shape')
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