- 		  -2: draw no box, no tick marks, no
numeric tick labels, no axes.
		 
- 		  -1: draw box only.
		 
- 		  0: draw box, ticks, and numeric tick labels.
		 
- 		  1: also draw coordinate axes at
		  x=0 and y=0.
		 
- 		  2: also draw a grid at major tick
positions in both coordinates.
		 
- 		  3: also draw a grid at minor tick
positions in both coordinates.
		 
- 		  10: same as 0 except logarithmic
		  x tick marks. (The x
		  data have to be converted to logarithms separately.)
		 
- 		  11: same as 1 except logarithmic
		  x tick marks. (The x
                  data have to be converted to logarithms separately.)
		 
- 		  12: same as 2 except logarithmic
		  x tick marks. (The x
                  data have to be converted to logarithms separately.)
		 
- 		  13: same as 3 except logarithmic
		  x tick marks. (The x
                  data have to be converted to logarithms separately.)
		 
- 		  20: same as 0 except logarithmic
		  y tick marks. (The y
		  data have to be converted to logarithms separately.)
		 
- 		  21: same as 1 except logarithmic
		  y tick marks. (The y
                  data have to be converted to logarithms separately.)
		 
- 		  22: same as 2 except logarithmic
		  y tick marks. (The y
                  data have to be converted to logarithms separately.)
		 
- 		  23: same as 3 except logarithmic
		  y tick marks. (The y
                  data have to be converted to logarithms separately.)
		 
- 		  30: same as 0 except logarithmic
		  x and y tick marks. (The x and y
		  data have to be converted to logarithms separately.)
		 
- 		  31: same as 1 except logarithmic
		  x and y tick marks. (The x and y
                  data have to be converted to logarithms separately.)
		 
- 		  32: same as 2 except logarithmic
		  x and y tick marks. (The x and y
                  data have to be converted to logarithms separately.)
		 
- 		  33: same as 3 except logarithmic
		  x and y tick marks. (The x and y
                  data have to be converted to logarithms separately.)