Hopefully this is not too inappropriate:

   require 'plot'
   X=: 16 * (1&o.)^3:
   Y=: 13 _5 _2 _1 +/ .* 2 o. (1+i.4)&*
   plot (X j. Y"0) i: 3.15j1000

Thanks,

-- 
Raul
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