use dcl
call DclOpenGraphics()
call DclNewFrame
call DclSetWindow( xmin, xmax, ymin, ymax )
call DclSetViewPort( 0.2, 0.8, 0.2, 0.8 )
call DclSetTransFunction
call DclDrawScaledAxis
call DclDrawContour( p )
call DclCloseGraphics
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