[gradsusr] Facing a problem with Time derivative

Davide Sacchetti davide.sacchetti at arpal.gov.it
Tue Jun 4 04:35:57 EDT 2019

vint(const(mslp,1000), q, 100) is the integrated moisture

if you want to display a time varying derivative you could use cdiff, 
otherwise, if time is fixed, suppose you would plot derivative at t=2
and suppose dtime=3h, you could:

d ( vint(const(mslp(t=3),1000),q(t=3),200)-
vint(const(mslp(t=1),1000),q(t=1),200) )/(2*3*3600)


On Tue, 2019-06-04 at 12:14 +0900, lpasmanoranjan wrote:
> Dear Users,
> I am having a problem while computing the time derivative of column
> integrated moisture, which is:
> (1/g) x ∂/∂t ∫qdp
> I can compute the column integrated moisture as vint(1000,q,100). I
> can't think the next.
> I appreciate for any kind of help or suggestion in this regard.
> -- 
> Kind Regards,
> Mano
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> gradsusr at gradsusr.org
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