# [ncl-talk] Need Help

isakhar sakhar isakhar isakhar.inside13 at gmail.com
Tue Oct 20 22:09:32 MDT 2015

```Dear Mr.Jack

I didn't catch it. Could you please explain more detail?

Best regards,
Soares

On Tue, Oct 20, 2015 at 10:20 AM, Jack Ogaja <jack.ogaja at gmail.com> wrote:

> Assuming that ‘everything’ else in your code is correct, the snippet(of
>
> ****
>   do it = 0,ntimes-1            ;Loop for the time: it= starting time
>    time = it
>         …
>           ; Calculate Wind Speed from Vectors
>                   spd = (u_plane*u_plane + v_plane*v_plane)^(0.5)
>                  windspd0(it)=spd(x,y) ;<=== instantaneous[compare to
> “dir0” below]
>
>           ; Wind direction at 0 Meters
>                 r2d = 45.0/atan(1.0)            ; conversion factor
>                 dir = atan2(u_plane,v_plane) * r2d + 180
>                 dir0 = dir(x,y)        ;<=== is always overwritten[compare
> to “windspd0(it)” above]
>  ****
> i.e. your directions will always be the last direction calculated in the
> loop.
>
> Jack.
>
> > On 20 Oct 2015, at 08:56, isakhar sakhar isakhar <
> isakhar.inside13 at gmail.com> wrote:
> >
> > Dear NCL Team
> >
> > I use the script in attachment to find Wind Speed and Wind Direction in
> a location. I can get the wind speed but I get odd result for wind
> direction because all same. The output also in the attachment.
> >
> > Regards,
> > Soares
> >
> <output.txt><wrf_script.ncl>_______________________________________________
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>
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