seewave (version 1.6.3)

wf: Waterfall display

Description

This function returns a waterfall display of a short-term Fourier transform or of any matrix.

Usage

wf(wave, f = NULL, wl = 512, zp = 0, ovlp = 0, fftw= FALSE, dB = "max0",
dBref = NULL, wn = "hanning", x = NULL,
hoff = 1, voff = 1, col = heat.colors,
xlab = "Frequency (kHz)", ylab = "Amplitude (dB)",
xaxis = TRUE, yaxis = TRUE,
density = NULL, border = NULL, lines = FALSE, lwd=NULL, ...)

Details

Data input can be either a time wave (wave) or a matrix (x). In that case, if xaxis is set to TRUE the x-axis will follow the row index. To change it, turn xaxis to FALSE and use axis afterwards. See examples.

See Also

spectro, spectro3D, dynspec

Examples

data(tico)
wf(tico,f=22050)
# changing the display parameters
jet.colors <- colorRampPalette(c("blue", "green"))
wf(tico,f=22050, hoff=0, voff=2, col=jet.colors, border = NA)
# matrix input instead of a time wave and transparent lines display
m <- numeric()
for(i in seq(-pi,pi,len=40)) {m <- cbind(m,10*(sin(seq(0,2*pi,len=100)+i)))}
wf(x=m, lines=TRUE, col="#0000FF50",xlab="Time", ylab="Amplitude",
main="waterfall display")