time series

[Sachin Ghude]

dear all,

I am trying to plot a  surface temperature time series averaged over the region
lon=0,lon=360,lat=-20,lat=20. I am using following function:

'd tloop(aave(maskout(t,t),lon=0,lon=360,lat=-20,lat=20))'

would somebody please advice me how to plot a time series averaged over the above
region which will not include surface temperature data over the region
lon=110,lon=150,lat=0,lat=20 while calculating the average.

Sachin D Ghude