[gradsusr] Decadal average plot

[Mubashar Ahmad]

Dear Grads Users,

I have monthly time series data (let say surface temperature) and
wanted to plot it on decadal average basis. I mean first value of plot
will be average of first 120 months and the next value of my plot will
be average of next 120 months and so on. In total for 200 years I
should get 20 value in plot. How can I do that? Y axis will be decadal
average temperature values and x axis can be labelled 1, 2, 3 up 20
instead of months or years.

Thanks,

Mubashar