I have done this. I would use zoo for the time series part, and I think I wrote a function using the min max after a period to locate the peak, go to the peak, and calculate the slope 4 hours afterward. If I can locate the code I don't mind sharing, but it is buried on my PhD machine.
On Feb 5, 2018 12:04 PM, "Janet Choate" <jsc....@gmail.com> wrote: > Dear R community, > > I'm hoping someone out there has perhaps done this and can share their code > and/or expertise with me. > > I need to pull recession periods out of a hydrograph - can anyone help me > with this? > I want to create a subset from streamflow data that consists of just the > recession curves - the decreasing runoff after the passage of a peak flow. > > would really appreciate any help on this! > Janet > -- > Tague Team Lab Manager > 1005 Bren Hall > UCSB, Santa Barbara, CA. > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
