seewave (version 1.4.5)

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 = FALSE, f, from = FALSE, to = FALSE, env = FALSE,
smooth = NULL, ksmooth = NULL, identify = FALSE, plot = TRUE, colwave1 = "black",
colwave2 = "blue", colbg = "white", coltitle = "black",
collab = "black", cexlab = 1, fontlab = 1, colaxis = "black",
coly01 = "grey47", coly02 = "black", title = FALSE,
bty = "l")

Arguments

wave1

data or a Sample object generated loading a wav file with loadSample (package sound) describing a first time wave. This can be a

wave2

data or a Sample object generated loading a wav file with loadSample (package sound) describing a second time wave.

f

sampling frequency of wave1 and wave1 (in Hz). Does not need to be specified if wave1 and/or wave2 are/is (a) Sample object(s).

from

start of the oscillogram (in s).

to

end of the oscillogram (in s).

env

logical, if TRUE plots the envelope of the time wave instead (by default FALSE).

smooth

if env is TRUE then smoothes the envelope by floating average.

ksmooth

if env is TRUE then smoothes the envelope by applying a kernel smoothing.

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.

colbg

background colour.

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

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

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)