[R] spectum

Bill Szkotnicki bszk at uoguelph.ca
Wed Oct 1 19:15:44 CEST 2008

In the help for spectrum it says:
"     If available, a confidence interval will be plotted by
     'plot.spec': this is asymmetric, and the width of the centre mark
     indicates the equivalent bandwidth. "

What you get is a blue bar on the right side of the plot.
I can understand the width of the centre mark.
But how does one make use of or interpret the bar itself?

What I would like to do is draw confidence curves on either side of the 
Is this possible or reasonable?


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