[RegCNET] filter technique

[Ufuk Utku Turuncoglu (BE)]

Hi,

You can do it by NCL. Look at the following example for 20-100 days filter.

     ;--- 20-100 days bandpass ---
     ihp = 2
     sigma = 1.0
     nWgt = 201
     fca = 1./100.
     fcb = 1./20.
     wgt = filwgts_lanczos(nWgt, ihp, fca, fcb, sigma)
     x_day_filter= wgt_runave_Wrap(x_day, wgt, 0)

Regards,

--ufuk

On 10/23/13 7:57 AM, pyarimohan maharana wrote:
> I currently have a daily model output for 20 years over Indian region, 
> but I need to filter it to study different intraseasonal oscillation 
> (10-20days, 40-60day etc) during the Indian summer monsoon period. 
> Does anybody have a grads script for this or any help??
>
>
> Thanks
>
> Pyarimohan Maharana
>
>
>
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