Re: [Rd] head/tail breaking change
> Jan Gorecki > on Thu, 19 Dec 2019 11:49:11 +0530 writes: > Thank you Gabriel, > I agree that new behaviour makes much more sense. Just wanted to confirm > before resolving compatibility of my unit tests. > Best, > Jan Indeed, Gabe's explanation is right-on-spot: With the generalization of head() / tail(), we really found it undesirable to stay "internally inconsistent". We do have to grab the chance for not-quite-back-compatible improvements -- when the costs look comparably small -- for R 4.0.0. Martin > On Wed 18 Dec, 2019, 10:46 PM Gabriel Becker, wrote: >> Jan, >> >> That is an intentional change as you can see in the documentation for >> head/tail in R-devel. Last time I discussed it with Martin, this behavior >> was desired and thus is unlikely to change unless "our" (ie his) mind does. >> >> The hope is that the new behavior is actually what people would want (note >> it already behaves this way for data.frames and for matrices, which are now >> explicitly array objects with 2 dimensions as well as classed as matrices, >> so its more consistent now, and more reasonable for the object). >> >> Best, >> ~G >> >> On Wed, Dec 18, 2019 at 2:44 AM Jan Gorecki wrote: >> >>> Hi R-devel community, >>> >>> I am aware of changes in R-devel in head/tail methods but I was not >>> expecting that to be a breaking change. >>> >>> # R 3.6.1 >>> ar = array(1:27, c(3,3,3)) >>> tail(ar, 1) >>> #[1] 27 >>> >>> The current output of R-devel is something that I would expect from a >>> >>> tail(ar, c(1, Inf, Inf)) >>> >>> or >>> >>> tail(ar, c(1, NA, NA)) >>> >>> calls. >>> Is it going to stay like this or there are plans to mitigate this >>> breaking change? >>> >>> # R-devel 2019-12-17 r77592 >>> ar = array(1:27, c(3,3,3)) >>> tail(ar, 1) >>> #, , 1 >>> # >>> # [,1] [,2] [,3] >>> #[3,]369 >>> # >>> #, , 2 >>> # >>> # [,1] [,2] [,3] >>> #[3,] 12 15 18 >>> # >>> #, , 3 >>> # >>> # [,1] [,2] [,3] >>> #[3,] 21 24 27 >>> >>> Best, >>> Jan Gorecki >>> >>> __ >>> R-devel@r-project.org mailing list >>> https://stat.ethz.ch/mailman/listinfo/r-devel >>> >> > [[alternative HTML version deleted]] > __ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] head/tail breaking change
Thank you Gabriel, I agree that new behaviour makes much more sense. Just wanted to confirm before resolving compatibility of my unit tests. Best, Jan On Wed 18 Dec, 2019, 10:46 PM Gabriel Becker, wrote: > Jan, > > That is an intentional change as you can see in the documentation for > head/tail in R-devel. Last time I discussed it with Martin, this behavior > was desired and thus is unlikely to change unless "our" (ie his) mind does. > > The hope is that the new behavior is actually what people would want (note > it already behaves this way for data.frames and for matrices, which are now > explicitly array objects with 2 dimensions as well as classed as matrices, > so its more consistent now, and more reasonable for the object). > > Best, > ~G > > On Wed, Dec 18, 2019 at 2:44 AM Jan Gorecki wrote: > >> Hi R-devel community, >> >> I am aware of changes in R-devel in head/tail methods but I was not >> expecting that to be a breaking change. >> >> # R 3.6.1 >> ar = array(1:27, c(3,3,3)) >> tail(ar, 1) >> #[1] 27 >> >> The current output of R-devel is something that I would expect from a >> >> tail(ar, c(1, Inf, Inf)) >> >> or >> >> tail(ar, c(1, NA, NA)) >> >> calls. >> Is it going to stay like this or there are plans to mitigate this >> breaking change? >> >> # R-devel 2019-12-17 r77592 >> ar = array(1:27, c(3,3,3)) >> tail(ar, 1) >> #, , 1 >> # >> # [,1] [,2] [,3] >> #[3,]369 >> # >> #, , 2 >> # >> # [,1] [,2] [,3] >> #[3,] 12 15 18 >> # >> #, , 3 >> # >> # [,1] [,2] [,3] >> #[3,] 21 24 27 >> >> Best, >> Jan Gorecki >> >> __ >> R-devel@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-devel >> > [[alternative HTML version deleted]] __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
Re: [Rd] head/tail breaking change
Jan, That is an intentional change as you can see in the documentation for head/tail in R-devel. Last time I discussed it with Martin, this behavior was desired and thus is unlikely to change unless "our" (ie his) mind does. The hope is that the new behavior is actually what people would want (note it already behaves this way for data.frames and for matrices, which are now explicitly array objects with 2 dimensions as well as classed as matrices, so its more consistent now, and more reasonable for the object). Best, ~G On Wed, Dec 18, 2019 at 2:44 AM Jan Gorecki wrote: > Hi R-devel community, > > I am aware of changes in R-devel in head/tail methods but I was not > expecting that to be a breaking change. > > # R 3.6.1 > ar = array(1:27, c(3,3,3)) > tail(ar, 1) > #[1] 27 > > The current output of R-devel is something that I would expect from a > > tail(ar, c(1, Inf, Inf)) > > or > > tail(ar, c(1, NA, NA)) > > calls. > Is it going to stay like this or there are plans to mitigate this > breaking change? > > # R-devel 2019-12-17 r77592 > ar = array(1:27, c(3,3,3)) > tail(ar, 1) > #, , 1 > # > # [,1] [,2] [,3] > #[3,]369 > # > #, , 2 > # > # [,1] [,2] [,3] > #[3,] 12 15 18 > # > #, , 3 > # > # [,1] [,2] [,3] > #[3,] 21 24 27 > > Best, > Jan Gorecki > > __ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > [[alternative HTML version deleted]] __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
[Rd] head/tail breaking change
Hi R-devel community, I am aware of changes in R-devel in head/tail methods but I was not expecting that to be a breaking change. # R 3.6.1 ar = array(1:27, c(3,3,3)) tail(ar, 1) #[1] 27 The current output of R-devel is something that I would expect from a tail(ar, c(1, Inf, Inf)) or tail(ar, c(1, NA, NA)) calls. Is it going to stay like this or there are plans to mitigate this breaking change? # R-devel 2019-12-17 r77592 ar = array(1:27, c(3,3,3)) tail(ar, 1) #, , 1 # # [,1] [,2] [,3] #[3,]369 # #, , 2 # # [,1] [,2] [,3] #[3,] 12 15 18 # #, , 3 # # [,1] [,2] [,3] #[3,] 21 24 27 Best, Jan Gorecki __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
