seewave (version 2.2.4)

dBscale: dB colour scale for a spectrogram display

Description

This function displays a vertical or horizontal dB colour scale to be used with spectro plots.

Usage

dBscale(collevels, palette = spectro.colors, side = 4,
textlab = "Amplitude\n(dB)", cexlab = 0.75,
fontlab = 1, collab = "black", colaxis = "black",...)

See Also

spectro.

Examples

data(pellucens)
# place the scale on the left and not on the right as spectro() does
def.par <- par(no.readonly = TRUE)
layout(matrix(c(1, 2), nc = 2), widths = c(1, 5))
par(mar=c(5,3,4,2))
dBscale(collevels=seq(-30,0,1),side=2)
par(mar=c(5,4,4,2))
spectro(pellucens, f=22050,wl=512,scale=FALSE)
par(def.par)
# place the scale on the top and not on the right as spectro() does
def.par <- par(no.readonly = TRUE)
layout(matrix(c(0,1,2,2), nc = 2, byrow=TRUE),widths=c(1,2),heights=(c(1,5.5)))
par(mar=c(0.5,3,4,2))
dBscale(collevels=seq(-30,0,1), textlab = "",side=3)
mtext("Amplitude (dB)",side=2,line = 1,at=0.6,cex=0.75)
par(mar=c(5,4,0.5,2))
spectro(pellucens, f=22050,wl=512,scale=FALSE)
par(def.par)