Re: [R] Rainflow, range pair counting

2012-10-04 Thread Dandy Ehlert
That is right. It is a part of materials engineering. Could say it’s a standard method in it. Better description is always on Wikipedia :) http://en.wikipedia.org/wiki/Rainflow-counting_algorithm Have found packs for all other big statistic software like Matlab or Diadem but none for R. And I

Re: [R] Rainflow, range pair counting

2012-10-04 Thread 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 c

Re: [R] Rainflow, range pair counting

2012-10-04 Thread Marc Schwartz
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

Re: [R] Rainflow, range pair counting

2012-10-04 Thread R. Michael Weylandt
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, 20

[R] Rainflow, range pair counting

2012-10-04 Thread Dandy Ehlert
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 loo