Hello,
Sorry to have bothered everyone on this one but I believe I have solved my own problem by using "VSUB" and "SQUO" in "GFUNC".
Thanks again,
Chris
From: Melick, Christopher James (UMC-Student)
Sent: Tue 7/25/2006 6:19 PM
To: gembud@xxxxxxxxxxxxxxxx
Subject: GDDIAG problem within GEMPAK
Hello,
I need to subtract two vector quantities within GFUNC and I notice that the logfile says that only scalars are allowed within the operand. The problem with that is that the resultant quantity needs to remain a vector since the last step is to use a dot product within my expression. How do I get around this seemingly difficult dilemma within GDDIAG? My last recourse if nothing can be done is to use another computer language like C or Fortran to do the calculations and then import the calculated fields into my GEMPAK file. I have listed below my output for this one parameter.
#----------------------------------------------------------------------------
# Calculate term 3A (dot product of Theta GRAD Tendency [Frontogenesis]
# and Theta-w GRAD)
#----------------------------------------------------------------------------
$GEMEXE/gddiag<<EOF>> $logfile
GFUNC = dot(quo(sub(GRAD(THTA)^${dtplus}/${gdatplus}00F000,GRAD(THTA)^${dtmin
us}/${gdatminus}00F00),7200),GRAD(THEWK))
GRDNAM = trm3A^${dt}/${gdat}00F000
r
EOF
$GEMEXE/gpend
Thank you for your help,
Chris Melick
___________________________________________________________
Christopher J. Melick
Ph.D. Student, Atmospheric Science
Department of Soil, Env, and Atmos Sciences
University of Missouri-Columbia
302 ABNR Building
Columbia, MO 65211
cjmzr5@xxxxxxxxxx
(573)-239-3999 cell
(573)-882-7739 work
