[ncl-talk] vectors in a cross section

[David Brown]

Hi Evelyn,

Sorry for the delay in answering. I don't think there is any simple
way in NCL to get different reference vectors for each vector
component, especially as an integrated annotation. It is possible to
get 2 annotations to appear: they are controlled by the vcRefAnno[xx]
and the vcMinAnno[xx]. There are angle resources for these annotations
so it should be possible to display one of them with a vertical arrow.
You would not be able to get reference values for each component from
VectorPlot but if you can calculate them yourself you can explicitly
set you own strings for each of these annotations.  You can also
explicitly set the magnitude used to scale the arrow for each of these
annotations.

If you need help getting this to work let us know. I don't think
anyone has tried it before.
 -dave



On Thu, Oct 16, 2014 at 5:16 PM, Evelyn Grell - NOAA Affiliate
<evelyn.grell at noaa.gov> wrote:
> Hi all,
>
> I have a question that is sort of along the same lines as that of Wolfgang
> Langhans...
> I am plotting wind vectors in a cross section, such that the vectors include
> the horizontal wind component along the cross section line, and the vertical
> wind component (w).
> I scaled w based on the viewport size and the distance covered by the cross
> section in the horizontal compared to the vertical.
> My question: Is there a way to get 2 reference vectors, one for the
> horizontal component, and one for the vertical component?  I am thinking it
> would look like a right angle, with 2 different numbers showing the
> horizontal/vertical wind speeds.
>
> Thanks!
> Evelyn
>
>
>
>
>
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