[R-gui] NEdit Highligth patterns for R
A.J. Rossini
rossini@u.washington.edu
11 Oct 2002 07:02:02 -0700
>>>>> "ernesto" == Ernesto Jardim <ernesto@ipimar.pt> writes:
ernesto> On Fri, 2002-10-11 at 09:00, Philippe Grosjean wrote:
>> 1) It would be interesting to highlight in different colors functions and
>> arguments... but they can have same name. Example: plot(x, col=2) -argument
>> 'col' and col(x), function 'col'. For the moment, the only easy way I found
>> is to define argument followed by = in the dictionnary, like 'col=' for the
>> argument. However, space is allowed between 'col' and '=', and then the
>> argument is not correctly coloured. So, I add an automatic correction that
>> eliminates spaces before a single '=' sign. But now that '=' is also allowed
>> as asignment, it is problematic: col = 1, with 'col' being the name of a
>> variable (indeed, col <- 1) is now highlighted as an argument.
Look back through the ancient discussion (i.e. 1992 or so) on
font-locking with Emacs. There are many good arguments against
turning your editor into "fruit-salad" (hence (X)Emacs provides
options for controling level of coloration/fontification variation).
>> 2) Of course, one could statically define the dictionnary with, let's say,
>> all functions and arguments in the base and recommended packages. I would
>> prefer a dynamic construction of the dictionnary: when a library is loaded,
>> terms are added, when it is unloaded, they are eliminated. This is only
>> possible with a bidirectionnal communication between the editor and the R
>> calculation kernel. I got this in SciViews but how to do that in Nedit or
>> other separate script editors?
ESS has been doing this forever, and I'm sure any modern editor with
extensibly scripting in a decent language can or already does this as
well (vim, alpha, etc...).
best,
-tony
--
A.J. Rossini Rsrch. Asst. Prof. of Biostatistics
U. of Washington Biostatistics rossini@u.washington.edu
FHCRC/SCHARP/HIV Vaccine Trials Net rossini@scharp.org
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