as.dummies              Create matrix of dummy vectors from single
                        factor
bracket                 Add rectangular bracket to plot
f2bark                  Convert between frequency in Hz and in Bark
f2mel                   Convert between frequency in Hz and in mel
                        units
f2st                    Convert between frequency in Hz and in
                        semitones
is.inrange              Check whether argument is within range
talkers                 Data set of talkers of Dutch from the
                        Netherlands.
