[R] legend for vectorplot in rasterVis

[Jim Lemon]

Hi Adrienne,
I'm not sure if this will help, but lengthKey in the plotrix package
will display a scale showing the relationship of vector length to
whatever numeric value is being displayed. However, you do have to
sort of the scaling manually.

Jim


On Tue, Mar 1, 2016 at 7:30 AM, Adrienne Wootten <amwootte at ncsu.edu> wrote:
> All,
>
> Your help with this is greatly appreciated!
>
> I'm working with the vectorplot function in rasterVis to produce wind
> vector maps (pretty much like the code in here -
> https://rpubs.com/alobo/vectorplot), but I was wondering about a legend.
>
> The vectors that vectorplot produces are wonderful.  What I'm trying to do
> is get a scale legend to go with it.  In other words, have a vector outside
> the main plot which provides a point of reference for the vectors in the
> plot.  Something alike to what GrADS does (for those familiar), is what I'm
> hoping to get to (for an example, the first chart on this page
> http://www.wishingwork.com/grads/graphics-controls/vector-graphics.html)
>
> I haven't seen this done yet with R, at least not from what I could find
> with all the forums.  If anyone has an idea on how to do this, I
> tremendously appreciate it!
>
> Thanks all!
>
> Adrienne
>
> --
> Adrienne Wootten
> Ph.D Candidate / Graduate Research Assistant
> State Climate Office of North Carolina
> Department of Marine, Earth and Atmospheric Sciences
> North Carolina State University
>
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