Re: [R] How to plot wind direction and strength field

From: Jim Lemon <jim_at_bitwrit.com.au>
Date: Tue, 29 Apr 2008 20:55:06 +1000

Jenny Barnes wrote:
> Dear R-help community,
>
> I have searched through the archives and not been able ot find any
> advice on how to plot a wind field with one arrow per grid square with
> the arrow pointing in the direction of the wind and it's size
> proportional to the wind strength.
>
> I have the wind speed data in arrays of [lon,lat,uwind] and
> [lon,lat,vwind] so it is broken down into u and v components. How do I
> plot it though?!?!
>
> Any suggestions very wecome indeed - I seem to have hit a brick wall.....

Hi Jenny,
Some time ago, there was a request for a direction field plot. I programmed a basic function, but perhaps the person found another solution, for I never heard any more of it. However, this is not too hard to do in R, even adding the arrows to a geographical plot. Could you post some data and perhaps a link to an example of what output you would like?

Jim



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