seewave (version 1.6.4)

dynspec: Dynamic sliding spectrum

Description

This function plots dynamically a sliding spectrum along a time wave. This basically corresponds to a short-term Fourier transform.

Usage

dynspec(wave, f, wl = 512, wn = "hanning", zp = 0,
ovlp = 0, fftw = FALSE, norm = FALSE, dB = NULL,  dBref = NULL, plot = TRUE,
title = TRUE, osc = FALSE, flab = "Frequency (kHz)",
alab = "Amplitude", alim = NULL, flim = c(0, f/2000),
type = "l", from = NULL, to = NULL, envt = NULL,
msmooth = NULL, ksmooth = NULL, colspec = "black",
coltitle = "black", colbg = "white", colline = "black",
colaxis = "black", collab = "black", cexlab = 1,
fontlab = 1, colwave = "black",
coly0 = "lightgrey", colcursor = "red", bty = "l")

Value

• If plot is FALSE, this function returns a matrix which columns correspond to the spectra computed along the time wave.

Details

Use the slider panel to move along the time wave. Use the argument norm if you wish to have each spectrum normalised, i.e. with values between 0 and 1 or maximised to 0 dB when dB is TRUE. The function requires the package rpanel that is based on the package tcltk.

See Also

spectro, spectro3D, wf, spec, fft, oscillo.

Examples

data(sheep)
require(rpanel)
dynspec(sheep,f=8000,wl=1024,ovlp=50,osc=TRUE)
dev.off()