Message-ID: <374cc144-95d3-479f-8abe-0b75f53f473e@w24g2000prd.googlegroups.com>
Date: 2008-09-11T04:58:34Z
From: yk
Subject: periodicity validation
In-Reply-To: <c502a9e10809101952l4a2ebc43pef04cf46b3fd7572@mail.gmail.com>
The data I mentioned above is oscilating vs time?but there are not
obersevable fixed cycle if I just plot this data.
How to get the average cycle?or the most probable range of cycle with
statistical methods?
I don't know how to achieve it by R, is there any command?
On Sep 11, 10:52 am, "stephen sefick" <ssef... at gmail.com> wrote:
> ?spectrum
> ?acf
> ?ccf
> library(wmtsa)
> ?wavCWT
> library(sowas)
> ?wsp
>
> you could also look at lagged plots to look for periodicity.
> if you elaborate on the problem and include executable sample code you
> will probably recieve more help.
>
> On Wed, Sep 10, 2008 at 10:02 PM, yk <shiyuankun.deb... at gmail.com> wrote:
> > There is a series of data contains time in fixed step and energy
> > varying with time, how to test its periodicity?In R, it seems there is
> > no direct tools since I have search the R manual with periodic and I
> > have not found any related topic.
> > Thanks a lot
>
> > ______________________________________________
> > R-h... at r-project.org mailing list
> >https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guidehttp://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
>
> --
> Stephen Sefick
> Research Scientist
> Southeastern Natural Sciences Academy
>
> Let's not spend our time and resources thinking about things that are
> so little or so large that all they really do for us is puff us up and
> make us feel like gods. We are mammals, and have not exhausted the
> annoying little problems of being mammals.
>
> -K. Mullis
>
> ______________________________________________
> R-h... at r-project.org mailing listhttps://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guidehttp://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.