Re: Got Trouble in Vector map

Hi Yikun,
You need to convert the u/v data arrays from type short to type float to
be able to plot the arrays (or to perform calculations on them) in NCL.

So change this:
  u = f1->uwnd(10,0,:,:)
  v = f2->vwnd(10,0,:,:)
to this:
  u = short2flt(f1->uwnd(10,0,:,:) )
  v = short2flt(f2->vwnd(10,0,:,:))

http://www.ncl.ucar.edu/Document/Functions/Contributed/short2flt.shtml

Hope that helps. If not, or if you have further questions, please
respond to ncl-talk..
Adam

On 03/21/2012 04:49 AM, yikun liu wrote:
> Hi,
>
> I want to draw a vector map of wind. I read u-wind and v-wind from two
> files separately, and use gsn_csm_vector to draw them. But the graphic
> turned out to be only have one direction. How can I draw vector map
> that uses u, v from different files?
>
> Thanks!
>
> Yikun
>
>
> PS: the data I used is from NCEP-DOE Reanalysis 2 Pressures-Level uwnd
> and vwnd
>
>
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-- 
______________________________________________________________
Adam Phillips                                asphilli@ucar.edu
NCAR/Climate and Global Dynamics Division       (303) 497-1726
P.O. Box 3000				
Boulder, CO 80307-3000    http://www.cgd.ucar.edu/cas/asphilli

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Received on Wed Mar 21 13:15:24 2012