[R] Adding units to levelplot's colorkey

Carlisle Thacker Carlisle.Thacker at noaa.gov
Wed Nov 23 13:37:05 CET 2011


On 11/23/11 2:20 AM, Deepayan Sarkar wrote:
> On Tue, Nov 15, 2011 at 6:53 PM, Carlisle Thacker
> <Carlisle.Thacker at noaa.gov>  wrote:
>> Sorry that I was not clear.  I was asking how to add annotation to
>> levelplot's colorkey, not the levelplot itself.  The only entry I can
>> find from the help pages is via its labels.
>> Googling did yield this:  " draw.colorkey() doesn't support a title for
>> the legend".  So I presume there is also no support for any other
>> annotation.
> That is correct. Note that having support for more annotation is not
> technically difficult, but it's not clear what a good design would be.
> For the purpose you describe, I typically do something like
> levelplot(volcano, colorkey = list(space = "top"),
>            main = "Height (cm)")
> But I don't know how to do this nicely with a vertical color key.
> -Deepayan

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