seewave (version 1.0)

dBscale: dB colour scale for a spectrogram display

Description

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

Usage

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

Arguments

collevels

a set of levels which are used to partition the amplitude range of the spectrogram (in dB).

palette

a color palette function to be used to assign colors in the plot, see note.

side

side of the axis, must be 2 (left) or 4 (right).

textlab

text of the label.

cexlab

character size of the label.

fontlab

font of the label.

collab

colour of the label.

...

other axis arguments.

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(2, 1), nc = 2), widths = c(1, 5))
par(mar=c(5,4,4,2))
spectro(pellucens, f=22050,wl=512,scale=FALSE)
par(mar=c(5,3,4,2))
dBscale(collevels=seq(-30,0,1),side=2)
par(def.par)