epgai {emuR}

Electropalatographic contact indices

Description

epgai(), epgci(), epgdi() return the anteriority index, the centrality index, the dorsopalatal index respectively as a trackdata object or a vector

Usage

epgai(epgdata, weights = c(1, 9, 81, 729, 4921))

Arguments

epgdata

An eight-columned EPG-compressed trackdata object, or an eight columned matrix of EPG-compressed trackdata, or a 3D palatographic array that is the output of palate()

weights

A vector of five values that are applied to EPG rows 1-5 respectively in epgai(). A vector of four values that are applied to columns 1 and 8, to columns 2 and 7, columns 3 and 6, columns 4 and 5 respectively. Defaults to the values given in Recasens & Pallares (2001).

Details

These are exact implementations of the formulae for calculating the EPG anteriority, EPG centrality, and EPG dorsopalatal indices as described in Recasens & Pallares (2001).

Value

These functions return a trackdata object if they are applied to an eight-columned EPG-compressed trackdata object, otherwise a one-columned matrix.

Author(s)

Jonathan Harrington

References

GIBBON, F. AND NICOLAIDIS, K. (1999). Palatography. In W.J. Hardcastle & N. Hewlett (eds). Coarticulation. (pp. 229-245). Cambridge University Press: Cambridge.

RECASENS, D. & PALLARES, M. (2001) Coarticulation, assimilation and blending in Catalan consonant clusters. Journal of Phonetics, 29, 273-301.

See Also

epgcog epggs palate

Examples

#  Anteriority index: trackdata
ai <- epgai(coutts.epg)
#  Dorsopalatal index, one-columned matrix
di <- epgdi(dcut(coutts.epg, 0.5, prop=TRUE))
# Next to examples: Centrality  index, one-columed matrix
ci <- epgci(palate(coutts.epg))
ci <- epgci(palate(dcut(coutts.epg, 0.5, prop=TRUE)))