I was thinking about xts and zoo as well! Thanks!
Erin Hodgess, PhD mailto: erinm.hodg...@gmail.com On Tue, Apr 8, 2025 at 12:39 AM Eric Berger <ericjber...@gmail.com> wrote: > If you are writing a new package I don't see why you should restrict > yourself to S3 or S4 classes. > Your "new package" can certainly build on other packages. (Why not?) > As I wrote in my previous email, if you are dealing with time series > you might want to consider appropriate classes already defined in > other packages, such as those obtained via > > library(fpp3) > > In my work, I deal with many financial time series. I highly recommend > the xts package which is a subclass of the zoo class. The zoo class is > an S3 time series class built on matrix. > The xts class is "designed for fast, consistent time-based indexing, > ideal for financial time series" (quoting ChatGPT here). > > The xts package is maintained by Joshua Ulrich who is extremely active > and helpful in responding to questions about xts in the R-help lists. > > HTH, > Eric > > On Tue, Apr 8, 2025 at 2:24 AM Erin Hodgess <erinm.hodg...@gmail.com> > wrote: > > > > We can have different frequencies of data, including Business day data > and > > daily data as our outputs. > > > > Both of those will start on Monday. > > > > Erin Hodgess, PhD > > mailto: erinm.hodg...@gmail.com > > > > > > On Mon, Apr 7, 2025 at 4:57 PM CALUM POLWART <polc1...@gmail.com> wrote: > > > > > Clearly something has gone terribly wrong. Everyone is saying use S3. > This > > > is an online discussion... So someone needs to support S4. > > > > > > Which frighteningly seems to be me! I'd caution you now... I first > used an > > > S4 object about two weeks ago and still have no real idea if they do > what I > > > think they do! > > > > > > My understanding is S4 objects can hold the source data and the > commands > > > to make the result data. Which means in terms of reproduction of > results > > > this may be better... > > > > > > ...I'm not at all sure I know what you want to do with your data. But > > > assuming you started with a time series of daily maximum temperature, I > > > think with an S4 object the daily maximum can be saved, plus the week, > > > month, season, year etc. > > > > > > If week could begin on a Monday or a Sunday, the info that is used to > > > decide is stored for reference. > > > > > > S4 can enforce data types. > > > > > > On Mon, 7 Apr 2025, 22:40 Jeff Newmiller via R-help, < > r-help@r-project.org> > > > wrote: > > > > > >> My opinion is that you should use S3 unless you absolutely need some > > >> syntactic sugar only offered by some other object system. > > >> > > >> Note that in a majority of cases you want to transform one standard > data > > >> structure to another... tibble to tibble is the fashion for dplyr... > and > > >> functions can often do what you want just fine except that they > sometimes > > >> end up needing a lot of arguments that you want to refer to in many > places. > > >> You can often make a class that holds those arguments so they can be > > >> re-used and where the class has methods to do the desired > transformation > > >> (s) where the bulk data remains handled as arguments and return values > > >> rather than as data in the object itself. > > >> > > >> The lm class in base R uses a "constructor computes and methods > retrieve > > >> results" approach... which isn't quite as flexible as a transformer > > >> approach but still hides the gory details. > > >> > > >> My reason for giving these examples is that the functional/OO approach > > >> expresses problems quite cleanly using S3... and you don't have to > pay the > > >> performance/hoop-jumping/extra dependencies that you need for R5 or > R7. > > >> That is, you should think carefully about whether you really need > whatever > > >> features that more advanced OO system offers... and then you will > know the > > >> answer to the question you posed for yourself. > > >> > > >> On April 7, 2025 10:35:44 AM PDT, Erin Hodgess < > erinm.hodg...@gmail.com> > > >> wrote: > > >> >Hello everyone! > > >> > > > >> >I have an opinion question please. If I’m writing a new package, > would > > >> you > > >> >recommend using S3 or S4 structure, please? > > >> > > > >> >I know I will get lots of opinions, but that’s fine. > > >> > > > >> >Thanks, > > >> >Erin > > >> > > > >> > > > >> >Erin Hodgess, PhD > > >> >mailto: erinm.hodg...@gmail.com > > >> > > > >> > [[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 > > >> https://www.R-project.org/posting-guide.html > > >> >and provide commented, minimal, self-contained, reproducible code. > > >> > > >> -- > > >> Sent from my phone. Please excuse my brevity. > > >> > > >> ______________________________________________ > > >> 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 > > >> https://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 > https://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 https://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
