error in max command with while loop

[dipak sahu]

Hii all users
     Here i faced some problem in grads looping , actually i want to extract
the maximum values of each 24hr(1day) simulation of a 1month simulation .dat
file. so for this i tried the command
d max(tc, t=1,t=9) --> this the command to find the maximum value of 1st day
(of 3hrly output saved file)
so similarly i've to write this command for each day upto t=248, 31
times.But i want to  implement the while loop to do this like

reinit'
'open test-uprobe-3dvar.ctl'
'set lat 29.45'
'set lon 80.16'
'set lev 850'
'set gxout fwrite'
'set fwrite maximum-temp-thal-3dvar.dat'
tt = 1
while (i<=241)
*'set t 'tt
'd max(tc,t=tt,t=tt+8)'
tt=tt+8
endwhile
'disable fwrite'
~
but this script file wasn't working. actually it was not taking the value of
"tt" inside the max command. So anybody has any idea regarding to this
issue, kindly suggest me.

thanking you in advance
with regards

--
********************************************
Dipak kumar Sahu,
Research Scholar,
Centre for Atmospheric Sciences.,
Indian Institute of Technology,Delhi
email:- dipak.sahu at iitd.acads.in
**********************************************
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