ts or xts with high-frequency data within a year
I "think" the problem is that you failed to set the "frequency" attribute of your time series, so it defaults to 1. A time series with one observation per period cannot be decomposed, since the error term is confounded with the "seasonality", which is essentially your error message. Again, a guess, as you provided no code. Cheers, Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
On Wed, Mar 30, 2016 at 8:18 AM, Bert Gunter <bgunter.4567 at gmail.com> wrote:
Code please. Reproducible example?(e.g. 1st 100 values) "PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code."
Bert Gunter
"The trouble with having an open mind is that people keep coming along
and sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
On Wed, Mar 30, 2016 at 8:03 AM, Ryan Utz <utz.ryan at gmail.com> wrote:
Hello,
I have a time series that represents data sampled every 15-minutes. The
data currently run from November through February, 8623 total readings.
There are definitely daily periodic trends and non-stationary long-term
trends. I would love to decompose this using basic time series analysis.
However, every time I attempt decomposition, I get the
Error in decompose( ) : time series has no or less than 2 periods
Is it only possible to do basic time-series analysis if you have a year or
more worth of data? That seems absurd to me, since there is definite
periodicity and the data are a time series. I have tried every manner of
specifying frequency= with no luck (96 does not work). All manner of
searching for help has turned up fruitless.
Can I only do this after I wait another year or two?
Thanks,
Ryan
--
Ryan Utz, Ph.D.
Assistant professor of water resources
*chatham**UNIVERSITY*
Home/Cell: (724) 272-7769
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