[R] R rectangle boundary question

[Paul Murrell]

Hi


> I am trying to produce two rectangles in R that are immediately adjacent
> to each other.  However, I always seem to get a white boundary around each
> rectangle, even though I have border=0.  Can anyone tell me how to get rid
> of that boundary?  Thanks!
>
> Here is a script of minimal length that illustrates my problem:
> -------------------------------------------------------------------
> postscript ( "out.ps", paper="letter" )
> par(mar=rep(0,4))
> plot(c(0,1), c(0,1), type="n", xaxs="i", yaxs="i", bty="n")
> rect ( 0,0,1,1, col="white", border=0 )
> rect ( 0.1, 0.1, 0.9, 0.9, col="darkgreen", border=0 )
> rect ( 0.2, 0.2, 0.8, 0.8, col="yellow", border=0 )
> dev.off()
> -------------------------------------------------------------------
>
> If you look at the output, you see that the yellow rectangle is surrounded
> by a tiny white boundary, instead of the color going immediately from
> yellow to green.


Setting border=0 means draw the border in colour "0" (which happens to be
white in this case).  If you do not want the border to be drawn, use
border=NULL.

This is hinted at in help(rect) with the default setting of col=NULL (which
does not fill the rect),
but we should probably document this more clearly.

Paul


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