[R] 3 levelplots and 1 colorbar

[Joaquin Rapela]

Your reply was very useful Rich. Thanks!

I would like to set the height of the viewport in draw.colorkey to match the
height of the levelplots, as it is done when I add colorkeys to all the
levelplots. The height of the levelplots varies depending on the number of
levelplots that I put on the figure. Do you know of any method to obtain the
height of the levelplots?

Thanks again, Joaquin

On Thu, Mar 25, 2010 at 04:40:13PM -0400, RICHARD M. HEIBERGER wrote:
> 
>    Joaquin,
> 
> 
> 
>    p <-levelplot(frame, colorkey=TRUE)
>    print(update(p, legend=NULL), position=c(0/4,0,1/4,1), more=TRUE)
>    print(update(p, legend=NULL),  position=c(1/4,0,2/4,1), more=TRUE)
>    print(update(p, legend=NULL),  position=c(2/4,0,3/4,1), more=TRUE)
> 
> 
> 
>    draw.colorkey(p$legend$right$args$key, draw=TRUE,
> 
>                         vp=grid::viewport(x=grid::unit(.9, "npc"),
> 
>                                                  y=grid::unit(.5, "npc"),
> 
>                                                  height=grid::unit(.8,
>    "npc")))
> 
> 
> 
>    This should get you started.  In your original code the print.trellis
>    function is leaving enough space for
> 
>    the legend in your third usage, hence the graph is smaller.
> 
> 
> 
>    The above code suppresses the legend all three times.
> 
>    That way the same space is allocated for the graph.  Then the key is
>    printed using
> 
>    the grid functions directly.
> 
> 
> 
>    Rich

-- 
Joaquin Rapela
PhD Student, Electrical Engineering
University of Southern California
3641 Watt Way,
Los Angeles, CA 90089-2520
tel/fax: (213) 821-2070
http://www-scf.usc.edu/~rapela
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