[EMAIL PROTECTED] wrote:
>
> Full_Name: Jerome Asselin
> Version: 1.6.2
> OS: redhat linux 7.2
> Submission from: (NULL) (142.103.173.179)
>
> This is certainly not a big problem, but should there really
> be a warning message when I run this?
>
> > x <- c(1,1,2,2,2,2,3,3)
> > hist(x,sub="Sub Title")
> Warning messages:
> 1: parameter "sub" couldn't be set in high-level plot() function
> 2: parameter "sub" couldn't be set in high-level plot() function
>
> The sub title DOES show on the graph. I believe the warning
> message is generated by axis() which does not deal with the
> parameter "sub".
>
> The hist() help file says:
> ...: further graphical parameters to `title' and `axis'.
>
> I am aware of the challenges of dealing with dots (...) in
> functions. Perhaps just a note in the help file about this
> would be the best way to keep the code simple.
>
> Regards,
> Jerome
>
This is very common. You will see similar warnings (Note: warnings, not
errors!) for many high-level plot functions with many graphical
arguments. It would be a bad idea to mention that on almost every
high-level plot funtion's help page, I think. Nevertheless, it might be
worth to mention it in the FAQs (Kurt ?), because we see questions
(rather than bug reports without apparent reason) on R-help quite
regularly (about once a month, I guess).
BTW: Martin Maechler addressed the underlying "problem" in his R-devel
message:
Subject: [Rd] Changing "..." inside a function: impossible? desirable?
Date: Tue, 17 Dec 2002 19:07:08
where "problem" means that it is impossible (at least not easily with a
reasonable amount of code) to write code using "..." that avoids the
warning messages.
Uwe Ligges
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