newgraph

(* Set up the x axis to have three points. 
   Give it a little extra room to the right and left.
   The shash says to line up the hash marks so that
   if zero were on the axis, there would be a hash
   mark at zero. *)

xaxis size 1 min .8 max 3.2 hash 1 mhash 0 shash 0

    (* Don't produce hash labels automatically, but
       instead put three custom labels at hash marks
       1, 2 and 3. *)
    no_auto_hash_labels          
    hash_label at 1 : Kilobyte
    hash_label at 2 : Megabyte
    hash_label at 3 : Gigabyte

    (* This sets the font and font size of the labels, it also
       says to left/center justify them and rotate them down 
       60 degrees. *)

    hash_labels fontsize 12 font Times-Italic hjl vjc rotate -60

(* The y axis is more standard. *)

yaxis size 2 min 0 max 15 hash 5 mhash 4

  (* However, we're adding a labeled hash mark at 13.5 *)

  hash_at 13.5 hash_label at 13.5 : Control

  hash_labels fontsize 12    (* And we're setting the font size to 12 *)
  grid_lines grid_gray .7    (* And drawing grid lines at a grey level of 0.7 *)

(* Draw a reference line at y=13.5 through the whole graph *)

newline pts 0.8 13.5 3.2 13.5

(* This is a bad part of jgraph -- when you draw the gray grid lines, it
   makes the x axis gray.  I'm drawing this line to make it black again. *)

newline pts 0.8 0 3.2 0

(* And draw a red curve with red boxes and a doubly thick line *)

newcurve marktype box color 1 0 0 
         linetype solid color 1 0 0 
         linethickness 2
   pts 1 8  2 11  3 15