Jeremy,
You can use one or more of the logical functions that I
mentioned last time: LT, LE, GT, or GE. The GEMPAK
functions can get long and look cumbersome even for a
relatively simple looking mathematical formula. You may
even have to break up the formula if it gets too long (80
characters I believe). But this is something we have to
live with in GEMPAK.
LT (S1,S2) Returns 1 if S1 < S2; otherwise 0
LE (S1,S2) Returns 1 if S1 <= S2; otherwise 0
GT (S1,S2) Returns 1 if S1 > S2; otherwise 0
GE (S1,S2) Returns 1 if S1 >= S2; otherwise 0
Kwan
On Tue, 17 Oct 2006 18:11:56 +0100
Jeremy.Martin@xxxxxxxx wrote:
List,
Sorry to keep bothering everyone with these minor
questions. I am
practicing with creating grids with gddiag and I have ran
into a
problem. I saw an example for calculating the Showalter
Index and I
managed to get all the compnents calculated correctly.
However...the
example I saw said you could use one value if the lcl
press was less
than 500 mb and another if the lcl pressure is less than
500mb (moist
lapse rate versus dry lapse rate). Anyway...how do you
tell GFUNC to
use one parameter if certain condition is met...but use
another if it
is not. Do IF/THEN/ELSE statements work or is there
another function
that needs to be called.
Thanks for any help,
Jeremy Martin
WFO GLD
