Gabor transform
Gabor transform with simple spectrum
DOsgram(Xamp, DT = 0.008, multi = 1, scale.def = 0, TWIN = 2, TSKIP = 0.2, PCTTAP = 0.05, PLOT=TRUE)
Xamp |
signal |
DT |
sample rate interval (s) |
multi |
Multiples of time window estimate |
scale.def |
scaling flag for plotting (0=raw, 1=log, 2=sqrt) |
TWIN |
time for window |
TSKIP |
time for skip |
PCTTAP |
percent of taper to apply to individual windows |
PLOT |
logical, TRUE=plot to device |
This is a non-interactive version of SPECT.drive.
list
sig |
input signal |
dt |
deltat |
numfreqs |
Number of frequencies output |
wpars |
input parameters list(Nfft=numfreqs, Ns=Ns, Nov=Nov, fl=fl, fh=fh) |
DSPEC |
spectrum image |
freqs |
output frequencies (y axis) |
tims |
output times (x-axis) |
Jonathan M. Lees<jonathan.lees@unc.edu>
Lees, J. M. and Park, J., 1995: Multiple-taper spectral analysis: A stand-alone C-subroutine, Computers \& Geology, 21(2), 199-236.
evolMTM, evolfft, evolAR, plotevol
data(KH) ### swig(KH) Xamp <- KH$JSTR[[1]] Xamp <- Xamp[57914:72989] Nfft <- 1024 ### fft length Ns <- 512 ### number of samples in a window Nov <- 480 ### number of samples of overlap per window fl <- 0 ### low frequency to return fh <- 12 ### high frequency to return EV <- DOsgram(Xamp, DT = 0.008, multi = 1, scale.def = 0, TWIN = 2, TSKIP = 0.2, PCTTAP = 0.05)
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