anomaly

Dear all,
I tried to calculate olr anomaly. I used the synthax

f = addfile("olr.1979_2010.nc","r")
 var = f->olr
U= dim_avg(var(lat |: , lon| : ,time| :))
anom = U – var
 printVarSummary(anom)

I just remarked that U and var didn't have the same dimension.
can some one help me?
kinds regards

-- 
Sinclair ZEBAZE
Laboratory for Environmental modelling & Atmospheric Physics
 Department of Physics, Faculty of science  - University of YAOUNDE I
P.O.BOX  812 YAOUNDE - CAMEROON
Phone: (237) 77834713
_______________________________________________
ncl-talk mailing list
List instructions, subscriber options, unsubscribe:
http://mailman.ucar.edu/mailman/listinfo/ncl-talk