[R] Counting the number of cycles in a temperature test

[jim holtman]

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.steller at 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>>
>
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-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?