I insist: as a trial, apply function "resample" (package signal) I think it's worth doing a test ( it performs resampling through bandlimited interpolation) SF Il 06/set/2015 18:52, "Jeff Newmiller" <jdnew...@dcn.davis.ca.us> ha scritto:
> There are lots of them. You might be having trouble searching because you > don't know how to spell "interpolate". > > ?approx > ?spline > > Also look at the Time Series task view on CRAN. > --------------------------------------------------------------------------- > Jeff Newmiller The ..... ..... Go Live... > DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live > Go... > Live: OO#.. Dead: OO#.. Playing > Research Engineer (Solar/Batteries O.O#. #.O#. with > /Software/Embedded Controllers) .OO#. .OO#. rocks...1k > --------------------------------------------------------------------------- > Sent from my phone. Please excuse my brevity. > > On September 6, 2015 4:54:45 AM PDT, AltShift <allennug...@hotmail.com> > wrote: > >I need a function for regularising the time base of electronically > >acquired > >signals (i.e. vectors of samples with a nominally constant time base). > > > >For example, the accelerometer in my smartphone can deliver data at > >about 50 > >Hz, but the sampling rate varies by about 5% throughout a recording. I > >have > >developed signal processing functions that assume a constant sample > >rate, so > >I need to modify my input data vectors so that this assumption becomes > >true. > >Furthermore, if I want to combine signals from different sources that > >have > >different sampling rates, I will be obliged to harmonise the time > >bases, > >somehow. > > > >I have written routines in other languages to interpolate (generate a > >larger > >number of regularly spaced samples from the input series) or, what I > >call, > >"intrapolate" (generate a smaller number of regularly spaced samples > >from > >the input series), so it wouldn't be too hard form me to write a > >function > >that covers both, but I prefer not to reinvent wheels (unless my wheel > >is > >markedly better!) > > > >Can anyone tell me if there is already a package that might cover what > >I > >need? > > > > > > > > > >-- > >View this message in context: > > > http://r.789695.n4.nabble.com/Is-there-a-time-series-resampling-function-tp4711907.html > >Sent from the R help mailing list archive at Nabble.com. > > > >______________________________________________ > >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. > > ______________________________________________ > 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.