Todd Remund <tkremund98 <at> hotmail.com> writes: > I know that there is a function, (spectro3D), that produces the Power Spectrogram. Are there R functions > that produce the Frequency Spectrogram and the Phase Spectrogram? Thank you for your time.
fft in stats gives you all you need, possibly combined with some time window in package signal, which also has some higher level stuff. Do you really want to interpret the "frequency spectrum" (whatever it is) with real, imaginary part and signs? The docs of spectro3D gives makes me cringe: >>Following Heisenberg uncertainty principle, the short-term Fourier transform cannot be precised in both time and frequency. >> I know that's written in quite a few books, but that upside-down thinking has been a source of confusion for generations of students and professors (of biology, to say). Dieter ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
