u2d1.rb
require  gnarrayh
require  gnumru/advanceddclh
include  NumRu::AddvancedDCL
include  NMath
Dev.open
Frame.new
Axis.draw
Contour.draw(u)
Dev.close
Axis.title('X-TITLE',  'x-unit',  'Y-TITLE',  'y-unite)
Fig.window=[tmin, tmax, zmin, zmax]
u2d1.rb(RubyDCL)