[ncl-talk] PLOTTING 95% STATISTICAL SIGNIFICANT WIND VECTORS

[Rashed Mahmood]

I think you may want to replace two lines, from these:
aveX_u=where(alpha_u.le.95.and.alpha_v.le.95,u_wet_yr at _FillValue,u_wet_yr)
aveX_v=where(alpha_u.le.95.and.alpha_v.le.95,v_wet_yr at _FillValue,v_wet_yr)

to these:
aveX_u=where(alpha_u.le.95.*or*.alpha_v.le.95,u_wet_yr at _FillValue,u_wet_yr)
aveX_v=where(alpha_u.le.95.*or*.alpha_v.le.95,v_wet_yr at _FillValue,v_wet_yr)

Note that in this case you may get very few wind vectors.


Rashed



On Fri, May 22, 2020 at 10:36 AM dickson mbigi via ncl-talk <
ncl-talk at ucar.edu> wrote:

> Kindly hep/guidance,
> I did composite analysis of wind data and I need to plot only significant
> wind vectors. So far, I went through a related thread "
> https://www.ncl.ucar.edu/Support/talk_archives/2010/1031.html" but I
> couldnt figure out how to make it because it was not clear in this regard
> especially in carrying out t-test and subsequent plotting.
>
> Attached is my script which actual contain the whole  idea from the
> mentioned thread on performing t-test (refer line 127-149). Actually, the
> script plots zonal wind anomalies and overlaid wind vectors (attached
> picture).
>
> NB: Wind data is from NCEP-NCAR Reanalysis 1
>
> I would highly appreciate for any help.
>
> *Kindest regards,*
> *Dickson Mbigi,*
> *Institute of Atmospheric Physics,*
> *Chinese Academy of Sciences, China.*
>
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