Geoscience Reference
In-Depth Information
We convert the scales to pseudo-frequencies using the equation for the
Morlet wavelet, which we i nd in the wavelet dei nitions in the
cwtft
help
section.
f = 1./(4*pi*cwtstruct.scales/(w0+sqrt(2+w0^2)));
a
b
Fig. 5.16
Wavelet power spectrum showing a signii cant period at 5 cycles that persists
throughout the full length of the time vector. h e wavelet power spectrum has been calculated
using
a
the continuous 1D wavelet transform
cwt
and
b
the continuous wavelet transform
using the FFT algorithm
cwtft
.
