Frequency and Phase Spectrograms

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