This was what I was looking for! Thank you! I apologize for my insufficient google-fu today.
On Fri, Aug 10, 2018 at 12:55 PM Georgi Boshnakov < georgi.boshna...@manchester.ac.uk> wrote: > Maybe Martin Maechler's post in response to a similar question answers > your question: > > https://stat.ethz.ch/pipermail/r-package-devel/2018q2/002780.html > > In summary, wrap the code in: > > if (requireNamespace("MASS", quietly = TRUE)) withAutoprint({ > > your code > > }) > > > Georgi Boshnakov > > -----Original Message----- > From: R-package-devel [mailto:r-package-devel-boun...@r-project.org] On > Behalf Of Zhian Kamvar > Sent: 10 August 2018 12:26 > To: Alexandre Courtiol > Cc: R-list Package Devel > Subject: Re: [R-pkg-devel] Printing examples conditionally on another > package in Suggests > > Thanks, but my use of print here is really a toy example, not necessarily > the end-goal. This strategy would fail if I were to attempt load a data set > from some_package or use any functions from some_package. > > A more specific example of what I'm dealing with is here: > > http://www.repidemicsconsortium.org/incidence/reference/get_counts.html#examples > . > This is what the user would see if they were to use example(get_counts). > > On Fri, Aug 10, 2018 at 12:14 PM Alexandre Courtiol < > alexandre.court...@gmail.com> wrote: > > > Perhaps then something like: > > Print <- function(x) if (requireNamespace("some.package", quietly = > TRUE)) > > print(x) > > Print("Hi") > > Print("Hello") > > Print("Goodbye") > > > > > > > > On Fri, 10 Aug 2018 at 12:33, Zhian Kamvar <zkam...@gmail.com> wrote: > > > >> Mainly, I would like to see the value printed after the print statement > >> like it would appear in a normal R session: > >> > >> print("Hi") > >> #> [1] "Hi" > >> print("Hello") > >> #> [1] "Hello" > >> print("Goodbye") > >> #> [1] "Goodbye" > >> > >> > >> On Fri, Aug 10, 2018 at 11:28 AM Alexandre Courtiol < > >> alexandre.court...@gmail.com> wrote: > >> > >>> Hi Zhian, > >>> Could you please explain what behaviour you would like to obtain? > >>> I really don't understand what your problem is from your description... > >>> Alex > >>> > >>> On Fri, 10 Aug 2018 at 12:18, Zhian Kamvar <zkam...@gmail.com> wrote: > >>> > >>>> Hello, > >>>> > >>>> I know it's good practice to use > >>>> > >>>> if (require("some_package")) { > >>>> # some code that needs some_package > >>>> } > >>>> > >>>> In R examples that needs a package listed in Suggests. > >>>> > >>>> The problem with this approach is that if there are any print > statements > >>>> within this structure, then they only get printed after the braces and > >>>> not > >>>> after the lines like so: > >>>> > >>>> if (TRUE) { > >>>> print("Hi") > >>>> print("Hello") > >>>> print("Goodbye") > >>>> } > >>>> #> [1] "Hi" > >>>> #> [1] "Hello" > >>>> #> [1] "Goodbye" > >>>> > >>>> The only way I can think of circumventing this is by replacing the if > >>>> statement with a stopifnot statement: > >>>> > >>>> stopifnot(require("some_package")) > >>>> # some code that needs some_package > >>>> > >>>> But, I'm not sure if that's okay to do in a function example. Does > >>>> anyone > >>>> have any ideas or suggestions on how to help with this kind of thing? > >>>> > >>>> Cheers, > >>>> Zhian > >>>> > >>>> [[alternative HTML version deleted]] > >>>> > >>>> ______________________________________________ > >>>> R-package-devel@r-project.org mailing list > >>>> https://stat.ethz.ch/mailman/listinfo/r-package-devel > >>>> > >>> > >>> > >>> -- > >>> Alexandre Courtiol > >>> > >>> http://sites.google.com/site/alexandrecourtiol/home > >>> > >>> *"Science is the belief in the ignorance of experts"*, R. Feynman > >>> > >> > > > > -- > > Alexandre Courtiol > > > > http://sites.google.com/site/alexandrecourtiol/home > > > > *"Science is the belief in the ignorance of experts"*, R. Feynman > > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-package-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-package-devel > [[alternative HTML version deleted]] ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
