Re: hodographs

Nobody has answered so ....

[1]
There is no existing, supported hodograph function in NCL.

[2]
At some level, perhaps not 'seen' by the user, the wind
and direction must be reduced to u/v for plotting. The user
who donated xy_28.ncl had u and v data. Not sure there
is any "shame" with this approach.

[3]

I copied the wind rose code and created the **alpha level**
hodograph function [attached]. I also used

Example 4
http://www.ncl.ucar.edu/Applications/axes.shtml
for an alternative look.

You can play with this to get what you want.

http://www.cgd.ucar.edu/~shea/hodograph.ncl
http://www.cgd.ucar.edu/~shea/hodo_cartesian.ncl
http://www.cgd.ucar.edu/~shea/wind_hourly.txt

The hodo_cartesian.ncl is needed *only* if you want the
cartesian background.

Good luck

On 8/4/10 12:35 AM, Christopher Steele wrote:
> Hi everyone,
>
> I'm trying to produce hodographs, with observations using both wind
> speed and direction. Does anyone know if there exists a way of producing
> a circular plot similar to the wind rose without the need of converting
> the variables into u and v components as with xy_28.ncl? It just seems a
> shame having to reduce to components in order to look at variables that
> you already have.
>
> cheers
>
> Chris
>
>
>
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Received on Mon Aug 9 07:39:11 2010