You can count the number of times the values make a transition through some threshold and average over some short time period because you probably get multiple transitions in a short time as it is approaching the threshold. Once you have that, you can count then number of times it happens.
On Mon, Jul 6, 2009 at 7:14 AM, Steller, Antje (GQL-LM)<antje.stel...@volkswagen.de> wrote: > Hello dear R-users, > today I have a question that I completely do not know how to solve > (R-newbie!). > > In a temperature chamber I have measured temperature over time. The result is > shown in the attached eps-file (if attachments are shown): There are two > temperature levels, 150°C and -40°C. A complete cycle includes about 30 > minutes upper temperature, quick change to the lower level, 30 minutes hold > at lower level. Then the temperature rises again to the upper level and a new > cycle begins. About 500 cycles have been completed. > > How can I count the number of cycles that have been completed? > > The data does not only include perfect temperature cycles. Once in a while > the machine would stand still and for a day or so the temperature would > remain at room temperature. So I cannot simply divide the measured time by > the duration of a cycle... > > Thanks a lot for your support, if necessary I could also provide the dataset. > > Antje > > > <<Temperaturzyklen.eps>> > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > > -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem that you are trying to solve? ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
