R help - Sep 2008 - Plotting the complex fft in 3D?

Hello,


I'm new to R (using it since about two weeks),
but absolutely a fan of it from the beginning on. :-)

Best tool for working with data I found. :-)

I tried using the fft() and other funcitons for
analysing time series.

What I would be glad to have, would be a
convenient way to display the complex result
of a fft in a way, that real and imaginary parts
each use an axis for themselves, and the index of the
resulting values use the third axe.

When displaying this as a 3D->2D picture,
it also would be nice, to change the view,
like it can be done with persp().

Is there already a package or script for preparing the data
of an fft to be displayed in this way?

Ciao,
   Oliver

Oliver Bandel wrote:
> Hello,
>
>
> I'm new to R (using it since about two weeks),
> but absolutely a fan of it from the beginning on. :-)
>
> Best tool for working with data I found. :-)
>
> I tried using the fft() and other funcitons for
> analysing time series.
>
> What I would be glad to have, would be a
> convenient way to display the complex result
> of a fft in a way, that real and imaginary parts
> each use an axis for themselves, and the index of the
> resulting values use the third axe.
>
> When displaying this as a 3D->2D picture,
> it also would be nice, to change the view,
> like it can be done with persp().
>
> Is there already a package or script for preparing the data
> of an fft to be displayed in this way?
I don't find this very enlightening, but here you go:

x <- rnorm(1000)
f <- fft(x)

library(rgl)
plot3d(1:length(f), Re(f), Im(f))


Duncan Murdoch