[R] Rainflow, range pair counting

[Bert Gunter]

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

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