buildtrack {emuR}

Build trackdata objects from the output of by()

Description

buildtrack() converts a list that is the output of by.trackdata() into a trackdata object if the list components are matrices whose rows are successive values in time.

Usage

buildtrack(mylist, ftime = NULL, trackname = "")

Arguments

mylist

a list that ist output from by()

ftime

ftime

trackname

name of track data object

Details

The default of by.trackdata() is to return a list. If each element of the list consists of a matrix whose rows are values occurring at the times given by the row dimension names of the matrix, then buildtrack() can be used to convert the list into a trackdata object. If the times are not given in the row dimension names, then these can be supplied as an additional argument to buildtrack()

Author(s)

Jonathan Harrington

See Also

by

Examples

   #vowlax.fdat is a track data objects of formant of the vowlax segment list
   #calculate the difference between adjacent formant values
   p = by(vowlax.fdat[1,2],INDICES=NULL, diff)
   
   p
   
   
   #now build a track data object out of these values
   m = buildtrack(p)
   
   m