seewave (version 1.6.4)

revw: Time reverse of a time wave

Description

Reverse the wave along the time axis.

Usage

revw(wave, f, env = TRUE, ifreq = TRUE,
plot = FALSE, output = "matrix", ...)

Value

• If plot is FALSE, a new wave is returned. The class of the returned object is set with the argument output.

Details

If plot is TRUE returns an oscillogram of the reversed wave. The amplitude and the instantaneous frequency can be independently reversed thanks to the arguments env and ifreq. See the examples.

References

Beeman, K. 1998. Digital signal analysis, editing and synthesis in Hopp, S. L., Owren, M. J. and Evans, C. S. (Eds) 1998. Animal acoustic communication, pp. 59-103. Springer, Berlin, Heidelberg.

See Also

oscillo, addsilw, deletew, fadew, pastew, mutew

Examples

data(tico)
# simple reverse
revw(tico,f=22050,plot=TRUE)
# envelope reverse only
revw(tico,f=22050,ifreq=FALSE, plot=TRUE)
# instantaneous frequency reverse only
revw(tico,f=22050,env=FALSE, plot=TRUE)