[gradsusr] problem with a .ctl script.

[Ismaila Diallo]

Dear Grads User's

I have daily data of a model simulation for 10 years over Africa. So i want to 
extract the data for the sahel region (between lon -10 to 10 and lat 10 at 18). 
for that i have wrote this script for getting .dat file:

sdfopen /home/lpaosf/izo_moctar/RT.1996-2007_DAY.AVG.NC

set time jan1997 dec2006
set lon -25 30
set lat -10 30
define aa=aave(rt,lon=-8.5,lon=8.5,lat=10,lat=16)
set x 1
set y 1
set fwrite rain.day.sahelregcm.dat
set gxout fwrite
d aa
disable fwrite 


after the .dat script i need a .ctl program to use my data inj grads but i met 
many difficult when performing the .ctl program. 

So could someone taught me how must i do this script.
Believe in your great help

Sincerely
Ismaila