Getting number of variables

["Sudheer Joseph" <sjo_cma@xxxxxxxxxxx>]

Dear Users
                       I would like to get  variance calculted by defining
file/var=var1  vardat.dat
! The axis under consideration is irregular
let vardev=var1-var1[x=@ave]
let vardevsq= vardev^2
let sumsqvardev=vardevsq[x=@sum]
and then to devide it by the number of points i wanted to get the actual 
number of points
I tried using the `var1,return=size` - var1[x=@nbd] but is not working since 
the size of axis is not limited
it gives a return of 20000+ value which is the default ferret axis size
I would like to get the actual number of variables to devide the sum of 
suired deviations.
I realise that there is a function @var existing in ferret but wanted to use 
the manual calculation for some cross checking
can any one help
thanks,
sudheer


***************************************
Dr. Sudheer Joseph
Indian National Centre for Ocean Information Services
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Web- http://oppamthadathil.tripod.com
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