Rainflow, range pair counting
I'm going to make a wild guess that this might have something to do
with "bump hunting" =local conditional extrema. If so, the prim
package might be applicable.
Otherwise ("...cycles in time series") time series methods might be appropriate.
But I basically agree with others that the OP has not clearly
specified the issue.
Cheers,
Bert
On Thu, Oct 4, 2012 at 10:34 AM, Marc Schwartz <marc_schwartz at me.com> wrote:
A quick Google search suggests that the methods are used in material fatigue studies where varying stress loads are placed upon the material, which puts this into a materials engineering context. Using rseek.org does not give any joy. Perhaps someone with experience in that domain will chime in. Regards, Marc Schwartz On Oct 4, 2012, at 10:27 AM, R. Michael Weylandt <michael.weylandt at gmail.com> wrote:
R is used by many many folks, and most of us don't have the domain knowledge to make heads or tails of what you're mentioning here. You'll need to greatly clarify and perhaps ask on the appropriate R-SIG-* list. (Ecology maybe?) Perhaps rseek.org is also of help. Cheers, Michael On Thu, Oct 4, 2012 at 1:19 PM, Dandy Ehlert <dandy.ehlert at gmail.com> wrote:
Hello I got some question about R. Im searching for a function or R-code which makes me some collectives. In the literature they are called:
level crossing counting
rainflow counting
range pair counting
Cant believe that?s not available for R. May I just looking for the wrong word. There functions are used to count the cycles (Range and Means) of a time serie. Thx for helping :)
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Bert Gunter Genentech Nonclinical Biostatistics Internal Contact Info: Phone: 467-7374 Website: http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm