Associated plots of (F) the IBI versus the beat number n (a sample of 400000 iterations) and (G) the power spectrum of V (from a sample of 200000 iterations after the removal of the initial 200000 iterations) indicating quasiperiodic temporal evolution [the peaks in the power spectrum can be indexed (see text) in terms of three incommensurate frequencies (2.25, 4.25, and 6.25 Hz)]. Figures (H), (I), and (J) are the analogs of (E), (F), and (I), respectively, when data for V are recorded from the point (33.75 mm, 33.75 mm) that lies inside the inhomogeneity; here too we have quasiperiodic temporal evolution with three underlying incommensurate frequencies (4, 6.25, and 10.5 Hz).