seewave (version 1.7.6)

oscilloST: Show a stereo time wave as oscillograms

Description

This graphical function displays a stereo (2 channels) time wave as an oscillogram in a two-frame plot. The envelope of the wave can also be shown.

Usage

oscilloST(wave1, wave2 = NULL, f, from = NULL, to = NULL,
identify = FALSE, plot = TRUE, colwave1 = "black",
colwave2 = "blue", coltitle = "black",
collab = "black", cexlab = 1, fontlab = 1, colaxis = "black",
cexaxis = 1, coly01 = "grey47", coly02 = "black", title = FALSE,
bty = "l")

Arguments

wave1

a first R object.

wave2

a second R object.

f

sampling frequency of wave (in Hz). Does not need to be specified if embedded in wave.

from

start of the oscillogram (in s).

to

end of the oscillogram (in s).

identify

returns the time coordinate of points chosen with a cursor on the bottom oscillogram.

plot

logical, if TRUE returns an oscillographic or envelope plot of wave(by default TRUE).

colwave1

colour of the oscillogram or of the envelope of wave1.

colwave2

colour of the oscillogram or of the envelope of wave2.

coltitle

if title is TRUE, colour of the title.

collab

colour of axes title.

cexlab

character size for axes title.

fontlab

font for axes title.

colaxis

colour of the axes

cexaxis

mangification for axes annotation.

coly01

colour of the y=0 line of wave1.

coly02

colour of the y=0 line of wave1.

title

logical, if TRUE plots the title with information on time and f (by default FALSE).

bty

the type of box to be drawn around the oscillogram.

Value

• Data are returned as two-column matrix if plot is FALSE. identify returns a numeric object with the time coordinate of points successively chosen on the bottom oscillogram.

See Also

oscillo, dynoscillo

Examples

a<-synth(f=8000,d=1,cf=2000,am=c(50,10),plot=FALSE)
b<-synth(f=8000,d=1,cf=1000,fm=c(0,0,2000),plot=FALSE)
oscilloST(a,b,f=8000)