Thanks! I'll try to stick to that advice!
Maybe there is a better way... Here is what I want:
I want to save some default settings for a package.
The user can change these using a function similar to par().
I do not want to use options() here as it will be quite a lot of parameters.
I was thinking about an invisible object in the global environment and using
<<- or assign() to change the settings...
What other roads are there to go?
TIA
--Mark
Am 07.04.2012 um 22:51 schrieb Henrik Bengtsson:
> On Sat, Apr 7, 2012 at 1:30 PM, Mark Heckmann <mark.heckm...@gmx.de> wrote:
>> Hello,
>>
>> using the <<- assignment operator I do not understand why the following does
>> not work.
>>
>> l <<- list()
>> l
>> list()
>> l$arg1 <<- "test"
>> error in l$arg1 <<- "test" : Objekt 'l' not found
>>
>> ?"<<-" says: "The operators <<- and ->> cause a search to made through the
>> environment for an existing definition of the variable being assigned. If
>> such a variable is found (and its binding is not locked) then its value is
>> redefined, otherwise assignment takes place in the global environment. "
>>
>> Still I do noch understand why the above does not work. The object l is in
>> the global environment. Can someone explain it to me?
>
> Yes, the object 'l' is in the global environment, but 'l$arg1' is not,
> cf. exists("l$arg1") and exists("l"). Instead, this works:
>
> l <<- list();
> l$args1 <- "test";
>
> but much much much much much much much much much much much much much
> much much much much much much much much much much much much much much
> much much much much much much much much much much much better, do NOT
> use "<<-" (or assign()/get()) unless you fully understand what you're
> doing and have a very good reason for doing it, and that reason should
> be able pass the embarrassment-test on public R mailing lists. Got
> the point? Don't use it - there is another way to do what you want to
> achieve - you just have to ask/find out how.
>
> /H
>
>>
>> Thanks
>> --Mark
>>
>> Mark Heckmann
>> Blog: www.markheckmann.de
>> R-Blog: http://ryouready.wordpress.com
>>
>> ______________________________________________
>> R-help@r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
Mark Heckmann
Blog: www.markheckmann.de
R-Blog: http://ryouready.wordpress.com
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
