Re: [ferret_users] area average only for upwar motions

[Andrew Wittenberg <Andrew.Wittenberg@xxxxxxxx>]

On Tue, 7 Feb 2006, Seon Tae wrote:

> I want to make an area-avearge of a quantity like vertical velocity.
> But, i want to do it only for upward motion. I mean, i want to exclude
> downward motion in doing an area-average
> Do you guys help me with it?

! a new variable, with w<=0 set to missing
let w_up = IF w GT 0 THEN w

! average is computed only over the valid points
let w_up_ave = w_up[x=@ave,y=@ave]

Andrew