[R] lines() and recycled colours

[Petr Pikal]

Hi

not sure as I do not know actual syntax, but seems to me that in 
type=h there segments are drawn from x axis to x,y values, hence the 
recycling behaviour has some sense.

In other types I wonder if it was really useful to have each segment 
of a line painted by different colour. If this is a case why not use 
segments() directly?

And probably the same applies to lwd, where it would be also strange 
if each segment was different line width?

HTH
Petr


On 28 Feb 2006 at 9:31, Robin Hankin wrote:

To:             	RHelp <r-help at stat.math.ethz.ch>
From:           	Robin Hankin <r.hankin at noc.soton.ac.uk>
Date sent:      	Tue, 28 Feb 2006 09:31:29 +0000
Subject:        	[R] lines() and recycled colours

> Hi
> 
> ?lines says
> 
> 
>       For 'type = "h"', 'col' can be a vector and will be recycled as
>       needed.
> 
> 
> Why doesn't  lines() recycle colours for other types?
> 
> If I type
> 
> 
>  > plot(0:1,0:1,type="n")
>  > lines(runif(11),runif(11),col=c("red","green"))
>  >
> 
> 
> then all ten lines are red, with no warning given.  Is there a reason 
> why colour recycling would be a bad idea in this case?
>   Also, it would be nice if arguments such as lwd
> were recycled if needed too.
> 
> 
> 
> 
> --
> Robin Hankin
> Uncertainty Analyst
> National Oceanography Centre, Southampton
> European Way, Southampton SO14 3ZH, UK
>   tel  023-8059-7743
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
> http://www.R-project.org/posting-guide.html

Petr Pikal
petr.pikal at precheza.cz