[gradsusr] Script cording in Grads

[PHILBERT LUHUNGA]

 Dear Grads user, I am coding how to compute the moist potential vorticity at different layers and space. I am new in writing script. attached is the script, when I run the script it works, but I am worried if I have coded right. Please could any one cross check my script and suggest improvement.

AS EVER 
LUHUNGA 

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Philbert Modest Luhunga 
University of Pretoria  
Department of Geography,Geoinformatics and Meteorology 
Private Bag X20 Hatfield 0028 South Africa 
Tel +27 (0) 12 420 5164 
Fax +27 (0) 12 420 6385 
Mobile:+ 27826228060 
Email address: philuhunga at yahoo.com
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