ftwindow {seewave} | R Documentation |
Generates different Fourier Transform windows.
ftwindow(wl, wn = "hamming")
wl |
window length |
wn |
window name: bartlett , blackman ,
flattop , hamming , hanning , or rectangle
(by default hamming ). |
A vector of length wl
.
Try the example to see windows shape.
Jerome Sueur sueur@mnhn.fr
Harris, F.J., 1978. On the use of windows for harmonic analysis with the discrete Fourier Transform. Proceedings of the IEEE, 66(1): 51-83.
covspectro
, dfreq
, meanspec
,
spec
, spectro
, spectro3D
a<-ftwindow(512) b<-ftwindow(512,wn="bartlett") c<-ftwindow(512,wn="blackman") d<-ftwindow(512,wn="flattop") e<-ftwindow(512,wn="hanning") f<-ftwindow(512,wn="rectangle") all<-cbind(a,b,c,d,e,f) matplot(all,type="l",col=1:6,lty=1:6) legend(legend=c("hamming","bartlett","blackman","flattop","hanning","rectangle"), x=380,y=0.95,col=1:6,lty=1:6,cex=0.75)