On May 21, 2011, at 3:27 AM, Zablone Owiti wrote:
Dear Users,
I wish to know at what confidence level is the confidence interval
provided in the Spectrum function (plot.spec) plots.
The default level is clearly indicated in the arguments of the Usage
section on the help page of plot.spec.
The only information provided in the help regarding this is : a
confidence
interval will be plotted by plot.spec: this is asymmetric, and the
width of
the centre mark indicates the equivalent bandwidth.
The authors of R consider the code to be the final arbiter of "what
documentation is provided". The code is readily available, since the
plot.spec function is visible, and it is not at all difficult to find
the function that calculates the CI, since it is right at the top when
you type: plot.spec
Attached is an example plot with the BLUE confidence interval.
Nothing attached, but in this case I don't think it would add
anything. You probably need to read the Posting Guide before
attempting to attach items. The mail-server is very picky about what
it will accept.
Thanks
----------------------------
ZABLONE OWITI
GRADUATE STUDENT
David Winsemius, MD
West Hartford, CT
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