On Nov 27, 2009, at 9:55 AM, chris carleton wrote:
Hi All,
I'm trying to analyze some time series data and I have run into
difficulty. I have decadal sun spot data and I want to separate the
very regular periodic function from the trend and noise. I looked
into using stl(), but the frequency of the time series data must be
greater than 1 for stl(). My data covers a 1000 year interval from
9095 BP to 8095BP and the frequency is, therefore, 0.1 (because the
data are decadal). I've tried changing the frequency, but the only
frequency that creates a plot of the time series data which matches
the raw data is 0.1. Is there anything I can do to the data that
will make it more amenable to stl(), or is there another package
that I could use for decomposing the signal that does not require
that the frequency of the time series to be greater than 1? Thanks,
I do not understand why you are not multiplying by 10 and rounding.
--
David
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
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