[R] Plotting in the margin

[Marc Schwartz]

Chris Adolph wrote:
> Hi,
> 
> I would like to place a line (tilted at an angle) in the margin of an
> R plot.  Is there any way to place such an annotation outside the
> plotting area?  
> 
> As an alternative, being able to plot a rotated character (the pipe,
> |) in the margin would be sufficient.  The problem is that mtext
> doesn't work with the srt option.  
> 
> As a further alternative, if I could put a legend in the margin, I
> could use the text command within the legend, and then srt would work
> (I've checked, and text("|",srt=x) seems to work for various values
> of x besides multiples of 90).  But I don't know how to put a legend
> in the margin either.    
> 
> Does anyone see how to make any of these approaches work?  Or perhaps
> there is yet another alternative? 

Take a look at this post by Paul Murrell just a few days ago. He
provides some example code to do this.

http://www.r-project.org/nocvs/mail/r-help/2002/9299.html

Gregory Warnes provides a different approach in the same thread here:

http://www.r-project.org/nocvs/mail/r-help/2002/9305.html

HTH,

Marc Schwartz


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