Logic Question

[Mark Sponsler]

I need your expert assistance

The goal is to display the greater of 2 variables, comparing them grib
point by grib point onto a single image in one display operation.  I
believe that 'if' and '>' can't be used in a define statement, hence the
dilemma:

Logically for each grib point I want to:

if (var1 >= var2)
   d var1
else
if (var2 > var1)
   d var2
endif

So I'm trying to figure out how to set up a define statement to accomplish
that.

define var3 = (logic here...)
d var3

Any thoghts would be most appreciated.