[gembud] Recent model run vs. previous one

[WAMM]

All:


I'm trying to write a script that makes a comparison of the most current
model run, say 24h forecast, versus the previous cycle's (say it is 6h
earlier) 30h forecast, effectively valid at the same time.  I'd like to
just be able to see changes in the model solution from previous runs.  I
have something like:

 

gdpfun= sub(hght^1200f012, hght^0600f018)

 

which actually works, but I'd like to be able to do something like this
with specifying the times, but a more general script in which it
compares the last run versus the previous one, something in the form of:

 

gdpfun= sub(hght^last, hght^'(last-1)')

 

I'd appreciate any suggestions as soon as possible.

 

Thanks,

Pedro

 

 

Pedro Mulero

Meteorologist, Wind Asset Management

1125 NW Couch, Suite 700

Portland, OR 97209

Office: 503.478.6302

Cell: 503.382.7827

Pedro.Mulero at PPMEnergy.com