| xopt
	  (const char *, input)	    Pointer to character string specifying options for the x axis.
	    The string can include any combination of the following letters
	    (upper or lower case) in any order:
	     		  b: Draws axis at base, at height
		  z=zmin where
		  zmin is defined
		  by call to plw3d.  This character must be specified in
		  order to use any of the other options.		  f: Always use fixed point numeric labels.
				  i: Inverts tick marks, so they are
		  drawn downwards, rather than upwards.
				  l: Labels axis logarithmically.  This
		  only affects the labels, not the data, and so it is
		  necessary to compute the logarithms of data points before
		  passing them to any of the drawing routines.
				  n: Writes numeric labels at major tick
		  intervals.
				  s: Enables subticks between major
		  ticks, only valid if t is also
		  specified.
				  t: Draws major ticks.
				  u: If this is specified, the text
		  label for the axis is written under the axis.
		
xlabel
	  (const char *, input)	    Pointer to character string specifying text label for the x
	    axis.  It is only drawn if u is in the
	    xopt string.
	  xtick
	  (PLFLT, input)	    World coordinate interval between major ticks on the x axis.
	    If it is set to zero, PLplot automatically generates a suitable
	    tick interval.
	  nxsub
	  (PLINT, input)	    Number of subintervals between major x axis ticks for minor
	    ticks.  If it is set to zero, PLplot automatically generates a
	    suitable minor tick interval.
	  yopt
	  (const char *, input)	    Pointer to character string specifying options for the y axis.
	    The string is interpreted in the same way as
	    xopt.
	  ylabel
	  (const char *, input)	    Pointer to character string specifying text label for the y
	    axis.  It is only drawn if u is in the
	    yopt string.
	  ytick
	  (PLFLT, input)	    World coordinate interval between major ticks on the y axis.
	    If it is set to zero, PLplot automatically generates a suitable
	    tick interval.
	  nysub
	  (PLINT, input)	    Number of subintervals between major y axis ticks for minor
	    ticks.  If it is set to zero, PLplot automatically generates a
	    suitable minor tick interval.
	  zopt
	  (const char *, input)	    Pointer to character string specifying options for the z axis.
	    The string can include any combination of the following letters
	    (upper or lower case) in any order:
	     		  b: Draws z axis to the left of the
		  surface plot.
				  c: Draws z axis to the right of the
		  surface plot.
				  d: Draws grid lines parallel to the
		  x-y plane behind the figure.  These lines are not drawn
		  until after plot3dorplmeshare called because of
		  the need for hidden line removal.		  f: Always use fixed point numeric labels.
				  i: Inverts tick marks, so they are
		  drawn away from the center.
				  l: Labels axis logarithmically.  This
		  only affects the labels, not the data, and so it is
		  necessary to compute the logarithms of data points before
		  passing them to any of the drawing routines.
				  m: Writes numeric labels at major tick
		  intervals on the right-hand vertical axis.
				  n: Writes numeric labels at major tick
		  intervals on the left-hand vertical axis.
				  s: Enables subticks between major
		  ticks, only valid if t is also
		  specified.
				  t: Draws major ticks.
				  u: If this is specified, the text
		  label is written beside the left-hand axis.
				  v: If this is specified, the text
		  label is written beside the right-hand axis.
		
zlabel
	  (const char *, input)	    Pointer to character string specifying text label for the z
	    axis.  It is only drawn if u or
	    v are in the
	    zopt string.
	  ztick
	  (PLFLT, input)	    World coordinate interval between major ticks on the z axis.
	    If it is set to zero, PLplot automatically generates a suitable
	    tick interval.
	  nzsub
	  (PLINT, input)	    Number of subintervals between major z axis ticks for minor
	    ticks.  If it is set to zero, PLplot automatically generates a
	    suitable minor tick interval.
	  
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