Hi Jim,
I forgot to say that I don't want to create curved arrows, just straight -
and I would like them to be proportional to the magnitude :o)
Thanks again for your time!
Jenny
On Tue, 29 Apr 2008, Jenny Barnes wrote:
Hi Jim,
I would like to plot something like figure 2 on this webpage:
http://www.cnrfc.noaa.gov/storm_summaries/jan1997storms.php
My data is very large - covering the whole globe at 2.5deg resolution so
longitude=144 girds, latitude=73 grids and time=32 years - hard to give you
that data......Would it help to give you a couple of grid squares worth of
data for one year?
Thanks,
Jenny
On Tue, 29 Apr 2008, Jim Lemon wrote:
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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