[R-pkg-devel] Registered S3 methods from standard package

Dr Colin Gillespie

Or more simply:  call the method prettyBplot.

Rightly (but perhaps wrongly) I was trying for a simple method where
the plots just change. If prettyB loaded, the plots just look a little
nicer. If prettyB isn't available, then the plot function works as normal.

So two possible options are:

  * registerS3method - I suspect this isn't permitted.
  * Don't override plot.default(), but override other methods. E.g.
boxplot.list() and plot.numeric(). But is this going against the
spirit of the law?

Thanks

Colin

Duncan Murdoch

Resetting to graphics::plot.default should be made possible as well.

The question remains whether registerS3method() can be used at all,
since the help says:

Internal namespace support functions.  Not intended to be called
      directly, and only visible because of the special nature of the
      ?base? namespace.

Cheers,

      Sebastian


Am 13.05.19 um 09:22 schrieb Colin Gillespie:

Dear All,

I'm developing a small package to make plotting methods a little bit
nicer looking:

https://github.com/jumpingrivers/prettyB/

The general idea is to replace plot.default() with an alternative
(matching all arguments) and export. This would allow users to simply
load the package and use base graphics functions as normal, but get a
pretty graph.

The general pattern I follow is:

https://github.com/jumpingrivers/prettyB/blob/master/R/plot.R#L23

which then includes S3method(plot,default) in my NAMESPACE file. When
building and checking the package I get

Registered S3 methods from standard package(s) overwritten by 'prettyB':
     method          from
     plot.default    graphics

which CRAN does not permit.

Question: Is it possible to achieve the functionality I'm after
(replacing the default plot.default() functions) while following the
CRAN rules?

Thanks

Colin