Dear GRADS Users, I have the NCEP-2 monthly data at 2.5x2.5 lon/lat for 17 vertical levels I want to calculate the meridional average for lon=-60 lon=10 such that the new data wil be of the form: lon =1 lat = -90 90 lev= 1 17 time =t1 tlast (1979-2007) Can anyone help with some ideas? Thanks in advance, hyacinth