[R] fft inverse display help

[rkevinburton at charter.net]

My question is how does 'plot' know to implicilty call the plot.ts (in the case of the full "exact" spectrum being fed back into the inverse?

Kevin

---- Dieter Menne <dieter.menne at menne-biomed.de> wrote: 
>  <rkevinburton <at> charter.net> writes:
> 
> > 
> > ff <- complex(length(fs))
> > ff[9] <- fs[9]
> > ff[5] <- fs[5]
> > 
> > Include the DC component:
> > 
> > ff[1] <- fs[1]
> > 
> > Take the inverse
> > 
> > fi <- fft(ff, inverse=TRUE) / length(ff)
> > 
> > Plot
> > 
> > plot(fi)
> > 
> > Notice that the plot is the Re vs. Im on the x and y axis' respectively.
> 
> In one case, you plot a complex vector (gives points in complex plane), in the
> other case a time series, where default assumption with a warning is to plot the
> real part only.
> 
> Try 
> 
> plot(as.ts(fi))
> 
> and you see the latter, where implicitely plot.ts is called.
> 
> Dieter
> 
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