Another GFUNC Question

[Kwan-yin Kong]

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 at noaa.gov 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
>
>