[gradsusr] Help on calculating 10 and 9o perectile extreme and convergence using Grads

[mmbuh at masonlive.gmu.edu]

?Hi everyone,

          Pretty new to grads and need help on the following:

 how do i calculate wet and dry extremes in grads ( i.e 90 and 10 percentile extremes of say precipitation from 1976 to 2005)

Also give the east wind and west wind for the period 1976 to 2005, (ie v, u), how do i calculate convergence?

      Thanks

Mbongowo J Mbuh
Department of Geography and Geoinformation Science
George Mason University



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