On Mon, 19-Jan-2004 at 06:36PM +0100, Peter Dalgaard wrote:
|> "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> writes:
|>
|> > As an absolute beginner, still reading "Modern Applied Statistics
|> > with S" and exercising with its examples, I'm frequently stopped
|> > by what it looks to be R poor help system (or is it my gigantic
|> > ignorance?). I mean that using help many arguments of a command
|> > seems to be given for granted like for instance:
|> > ...............................
|> > ?lines
|> > lines(x, ...)
|> >
|> > ## Default S3 method:
|> > lines(x, y = NULL, type = "l", col = par("col"),
|> > lty = par("lty"), ...)
|> >
|> > Arguments:
|> >
|> > x, y: coordinate vectors of points to join.
|> >
|> > type: character indicating the type of plotting; actually any of
|> > the 'type's as in 'plot'.
|> >
|> > col: color to use. This can be vector of length greater than one,
|> > but only the first value will be used.
|> >
|> > lty: line type to use.
|> >
|> > ...: Further graphical parameters (see 'par') may also be supplied
|> > as arguments, particularly, line type, 'lty' and line width,
|> > 'lwd'.
|> > ................................
|> >
|> > How could I quickly know during an R-session what values should be "col" set to
have red, how could I set "lty" etc.?
|>
|> Well, you might take a hint and look at ?par, in which this is in fact
|> explained. The above text is not saying that very explicitly, I agree.
... that hint being given a little further down the help for lines,
where it says:
See Also:
'points', 'plot', and the underlying "primitive" 'plot.xy'.
'par' for how to specify colors.
I can't think of a way that makes it easier to get to than that.
|>
|> However, it could be a good idea if we found a nice way of
|> integrating this sort of tabular material in the help system. The
|> case that really annoys me is that to get at the va�ues for 'pch',
|> you need to run example(points), which is both nonobvious and
|> disruptive if you are in the middle of constructing a complex plot
|> command.
Even in that case, it's not a big deal to run a separate R session in
another workspace (or even better, viewport in the pre-Gnome2 days)
where such ancillary tasks can run. There are OS limitations, of
course.
--
Patrick Connolly
HortResearch
Mt Albert
Auckland
New Zealand
Ph: +64-9 815 4200 x 7188
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I have the world`s largest collection of seashells. I keep it on all
the beaches of the world ... Perhaps you`ve seen it. ---Steven Wright
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