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Identified as root cause of a bug in data.table: https://github.com/Rdatatable/data.table/issues/3267 On my machine, strtoi("", base = 2L) produces NA_integer_ (which seems consistent with ?strtoi: "Values which cannot be interpreted as integers or would overflow are returned as NA_integer_"). But on all the other machines I've seen, 0L is returned....

...t.org <r-help-es en r-project.org> Subject: Re: [R-es] Trabajar con fechas y data.table Hola Jes?s, S?, s? existen ya funciones propias de data.table para esto. Mira esta p?gina con todas las funciones disponibles en data.table, al principio est?n todas las relacionadas con fechas: https://rdatatable.gitlab.io/data.table/reference/index.html Gracias, Carlos Ortega www.qualityexcellence.es<http://www.qualityexcellence.es> El dom., 15 nov. 2020 a las 7:56, Jes?s Para Fern?ndez (<j.para.fernandez en hotmail.com<mailto:j.para.fernandez en hotmail.com>>) escribi?: Buenas Para t...

...to messages at the R and C level to data.table. At the C level, we did _() wrapping for char arrays supplied to the following functions: error, warning, Rprintf, Error, and snprintf. This seemed OK but the use of snprintf specifically appears to have caused a crash on Windows: https://github.com/Rdatatable/data.table/issues/4402 Is there any guidance against using gettext with snprintf, or perhaps guidance on which "outputters" *are* OK for translation? Michael Chirico [[alternative HTML version deleted]]

...de?s clang and the other is used during usage of the package? ? Maybe someone could shed some light onto this topic :). ? P.S.: If you need some more details about the actual issue with data.table you can also check here (https://github.com/rstudio/rstudio/issues/14517) and here (https://github.com/Rdatatable/data.table/issues/5957). Or you can of course ask me, but it would be a little overkill to share everything that has been tried yet :).

...>>> Martin Maechler >>>>> on Fri, 11 Jan 2019 09:44:14 +0100 writes: >>>>> Michael Chirico >>>>> on Fri, 11 Jan 2019 14:36:17 +0800 writes: >> Identified as root cause of a bug in data.table: >> https://github.com/Rdatatable/data.table/issues/3267 >> On my machine, strtoi("", base = 2L) produces NA_integer_ >> (which seems consistent with ?strtoi: "Values which >> cannot be interpreted as integers or would overflow are >> returned as NA_integer_"). >...

Buenas Para trabajar con fechas suelo apoyarme en el paquete lubridate, pero me gustaria ver si hay algo en data.table que me permita quitar esa dependencia. ?Existe algo parecido? Gracias! [[alternative HTML version deleted]]

Hello, Following Dirk's post here: https://github.com/Rdatatable/data.table/issues/1619 we would like to clarify if this is the right behaviour, and if so, the rationale behind it. Here's the summary (thanks to Dirk and Joshua): Sys.setenv("TZ"="America/Chicago") dates = as.Date("2016-03-02") + (0:3)*7 # four Wednesdays # [1]...

Debugging this issue: https://github.com/Rdatatable/data.table/issues/2008 We have custom class 'IDate' which inherits from 'Date' (it just forces integer storage for efficiency, hence, I). The concatenation done by rbind, however, breaks this and returns a double: library(data.table) DF = data.frame(date = as.IDate(Sys.Date())) s...

https://github.com/Rdatatable/data.table/issues/2171 The fix was easy, it's just surprising to see the behavior change almost on a whim. Just wanted to point it out in case this is unknown behavior, but Evan seems to have found this as well. On Tue, May 23, 2017 at 12:00 PM, Michael Chirico <michaelchirico4 at gmail.co...

Hola Carlos, bueno la verdad es que mi pregunta era algo general, cuando no has usado data.table no parece muy intuitivo pasar de la forma de programar a la que estás más acostumbrado (bucles, notación matricial...) a esa otra. Aun no tengo un cálculo complejo concreto pero lo tendré que hacer... solo quería saber si se puede, y parece que sí, asi que será cuestión de empaparse un poco de

...t; > > >> > > On Sun, May 26, 2019 at 1:16 PM Michael Chirico <michaelchirico4 at gmail.com> > >> > > wrote: > >> > > > >> > > > Debugging this issue: > >> > > > > >> > > > https://github.com/Rdatatable/data.table/issues/2008 > >> > > > > >> > > > We have custom class 'IDate' which inherits from 'Date' (it just forces > >> > > > integer storage for efficiency, hence, I). > >> > > > > >> > > >...

...))) names(value[[jj]])[ri] <- nm Browse[2]> storage.mode(value[[jj]][ri]) [1] "double" > Mike C > > On Sun, May 26, 2019 at 1:16 PM Michael Chirico <michaelchirico4 at gmail.com> > wrote: > > > Debugging this issue: > > > > https://github.com/Rdatatable/data.table/issues/2008 > > > > We have custom class 'IDate' which inherits from 'Date' (it just forces > > integer storage for efficiency, hence, I). > > > > The concatenation done by rbind, however, breaks this and returns a double: > > > >...

...and a different use of %% and they just need to keep in mind that they are talking to a computer and not a blackboard. Here is an example of a feature that was meant to help users get more intuitive results with floating point numbers, but which actually caused headaches instead: https://github.com/Rdatatable/data.table/issues/1642 It is a slightly different scenario to this one, but I think it is still a good example of how we can end up creating unforeseen problems for people if we change core functionality to do unsolicited rounding behind the scenes. Best wishes, Frederick On Tue, Sep 11, 2018 at...

...double. > > > > > Mike C > > > > > > On Sun, May 26, 2019 at 1:16 PM Michael Chirico < > michaelchirico4 at gmail.com> > > > wrote: > > > > > > > Debugging this issue: > > > > > > > > https://github.com/Rdatatable/data.table/issues/2008 > > > > > > > > We have custom class 'IDate' which inherits from 'Date' (it just > forces > > > > integer storage for efficiency, hence, I). > > > > > > > > The concatenation done by rbind, however...

Hola Jesús, Sí, sí existen ya funciones propias de data.table para esto. Mira esta página con todas las funciones disponibles en data.table, al principio están todas las relacionadas con fechas: https://rdatatable.gitlab.io/data.table/reference/index.html Gracias, Carlos Ortega www.qualityexcellence.es El dom., 15 nov. 2020 a las 7:56, Jesús Para Fernández (< j.para.fernandez en hotmail.com>) escribió: > Buenas > > Para trabajar con fechas suelo apoyarme en el paquete lubridate, pero me &g...

...; *Subject:* Re: [R-es] Trabajar con fechas y data.table > > Hola Jesús, > > Sí, sí existen ya funciones propias de data.table para esto. > Mira esta página con todas las funciones disponibles en data.table, al > principio están todas las relacionadas con fechas: > > https://rdatatable.gitlab.io/data.table/reference/index.html > > Gracias, > Carlos Ortega > www.qualityexcellence.es > > > El dom., 15 nov. 2020 a las 7:56, Jesús Para Fernández (< > j.para.fernandez en hotmail.com>) escribió: > > Buenas > > Para trabajar con fechas suelo apo...

>>>>> Michael Chirico >>>>> on Fri, 11 Jan 2019 14:36:17 +0800 writes: > Identified as root cause of a bug in data.table: > https://github.com/Rdatatable/data.table/issues/3267 > On my machine, strtoi("", base = 2L) produces NA_integer_ > (which seems consistent with ?strtoi: "Values which cannot > be interpreted as integers or would overflow are returned > as NA_integer_"). indeed consistent with R&...

...t; >>>>> on Fri, 11 Jan 2019 09:44:14 +0100 writes: > > >>>>> Michael Chirico > >>>>> on Fri, 11 Jan 2019 14:36:17 +0800 writes: > > >> Identified as root cause of a bug in data.table: > >> https://github.com/Rdatatable/data.table/issues/3267 > > >> On my machine, strtoi("", base = 2L) produces NA_integer_ > >> (which seems consistent with ?strtoi: "Values which > >> cannot be interpreted as integers or would overflow are > >> returned as NA_int...

Bumping this up to the front again ... because it exhibits a difference in behaviour of R across OSs. Such a 'feature' may not be desirable. On 4 April 2016 at 18:00, Arunkumar Srinivasan wrote: | Hello, | | Following Dirk's post here: https://github.com/Rdatatable/data.table/issues/1619 | we would like to clarify if this is the right behaviour, and if so, | the rationale behind it. | | Here's the summary (thanks to Dirk and Joshua): | | Sys.setenv("TZ"="America/Chicago") | dates = as.Date("2016-03-02") + (0:3)*7 # four Wed...

You might find this discussion useful, too: https://github.com/Rdatatable/data.table/issues/2797 On 04/26/2018 11:01 PM, Henrik Bengtsson wrote: > If you're installing packages to the default location in your home > account and you didn't remove those library folders, you still have > you R 3.4 package installs there, e.g. > >> dir(dirname(.l...