This data set,
voice.five, is a list suitable as input for the
image command.
The
z component of the list is a matrix that is
92 by
64.
Each column of
z represents a periodogram over a short period of time; i.e., adjacent columns have half of their observations in common.
The rows of
z represent time, and the values in
z are the intensity of a frequency at a given time.
The data are courtesy of James Schimert, University of Washington.