[Rd] Give update.formula() an option not to simplify or reorder the result -- request for comments

Abby Spurdle @purd|e@@ @end|ng |rom gm@||@com
Sat May 25 00:59:14 CEST 2019

> Martin Maechler has asked me to send this to R-devel for discussion
> after I submitted it as an enhancement request (
> https://bugs.r-project.org/bugzilla/show_bug.cgi?id=17563).

I think R needs to provide more support for CAS-style symbolic computation.
That is, support by either the R language itself or the standard packages,
or both.
(And certainly not by interfacing with another interpreted language).

Obviously, I don't speak for R Core.
However, this is how I would like to see R move in the future.
...improved symbolic and symbolic-numeric computation...

I think any changes to formula objects or their methods, should be
congruent with these symbolic improvements.

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