seewave (version 1.7.6)

cutspec: Cut a frequency spectrum

Description

This function can be used to select (cut) a specific part of a frequency spectrum.

Usage

cutspec(spec, f = NULL, flim, norm = FALSE, PMF = FALSE)

Arguments

spec

a vector or a two-column matrix set resulting of a spectral analysis (not in dB) This can be the value obtained with spec or meanspec.

f

sampling frequency of spec (in Hz).

flim

a vector of length 2 to specify the new frequency range (in kHz).

norm

a logical, if TRUE the spectrum returned is normalised between 0 and 1.

PMF

a logical, if TRUE the spectrum returned is a probability mass function.

Value

• A new spectrum is returned. The class of the returned object is the one of the input object (spec)

See Also

spec, meanspec

Examples

data(orni)
a<-meanspec(orni,f=22050,plot=FALSE)
b<-cutspec(a,flim=c(4,8))
# quick check with a plot
plot(b,type="l")
# effects on spectral entropy
sfm(a)
sfm(b)