[gradsusr] doubt in cat command in grads

[dipak sahu]

Dear grads user
       I have some doubt in cat command in grads. I have two sets of ctl
and dat  files in grads one is RAINC.ctl, RAINC.dat and another one is
RAINNC.ctl, RAINNC.dat. And I tried to make these two .ctl file to one .ctl
file. so I tried the following command to creat one .dat file
$ cat RAINC.dat RAINNC.dat > RAIN.dat
and also make one .ctl file RAIN.ctl containing both the parameters RAINC
(1st variable)and RAINNC (2nd variable)

for verification I tried two cases in grads
*case-1*
open RAIN.ctl
set t 9
d rainc+rainnc (it gives value 0 90)

*case-2*
open RAINC.ctl
open RAINNC.ctl
set t 9
d rainc.1+rainnc.2 (it gives value 0 35)

So, is there anything wrong with the cat command in grads. If so what is
the alternate procedure to combine two .ctl and .dat files to make one file?

welcome for your suggestion
dipak

-- 
********************************************
Dipak kumar Sahu,
Research Scholar,
Centre for Atmospheric Sciences.,
Indian Institute of Technology,Delhi
email:- dipak_math at yahoo.com
**********************************************
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