The  file  "millim.ps"  contains  PostScript procedures that draw
millimetered  paper with logarithmic or linear scales both on x and y;
the user should write a PostScript program that calls these routines.

     To  do this, save millim.ps and edit a copy of that same file; go
to  the end, and replace all the instructions between the lines saying
"%%Page 1 1" and "%%Trailer".  Be careful:  THE CASE IS SIGNIFICANT in
PostScript!

- The first line must be "init".
- The  default  paper size is A4; if you are using Letter sized paper,
  insert  here  a single line saying "letter"; if you are using custom
  paper,  insert  here  two  lines  defining  the paper size, like the
  following  examples  (obey to the case and the spacing!  You can use
  as  units  inches,  centimeters or millimeters simply typing "in" or
  "cm"  or  "mm";  if  no unit is given the default is a "point", i.e.
  1/72th of an inch):

  /xsheet 8.5 in def
  /ysheet 297 mm def
  /xsheet 612 def

  ("xsheet"  and  "ysheet"  are  the  variable names holding the paper
  size; these statements store into them the correct values).
- The  default  page  orientation  is  portrait; if you need landscape
  orientation, insert here a single line saying "landscape".
- Then  insert  (optional) lines to modify the default values of every
  constant  that  do not satisfy you needs; these constants with their
  default values are:

  /margin     2 cm def
  /fontsize   10   def
  /bordersize 1    def
  /linesize   0.4  def
  /smallsize  0.01 def
  /bordergray 0    def
  /linegray   0    def
  /smallgray  0    def

  and their meaning is the following:
. "margin":   the  drawing is done in a rectangular region at "margin"
  from  the  paper  borders.   be sure that the axis labels can fit in
  "margin" (these labels are ALWAYS printed).
. "fontsize"  is the height (in points) of the font (Times-Roman) used
  to print the axis labels.
. "bordersize",  "linesize" and "smallsize" are the width in points of
  the  lines  used to draw the frame borders, the normal divisions and
  the  small  subdivisions  (see later for the definitions of the last
  two).
. "bordergray",  "linegray"  and  "smallgray"  are  the gray levels of
  these  same  lines:   they  must  be values from 0 to 1 inclusive, 0
  meaning black and 1 meaning white (i.e.  not drawn).  Be careful: on
  some printers "gray" lines are rendered as dotted lines;  or, "gray"
  and very thin lines  could or could not be drawn  according to their
  position on the page.
- Then, define two arrays "xscale" and "yscale" in the following way:

  /xscale [-2 2]     def      OR
  /xscale [0 1 10]   def      OR
  /xscale [0 2 10 4] def

  (the  difference  between  these  three  variants  is  the number of
  arguments inside the square brackets; the same works for yscale).
. With  two  arguments, the x/y scale is logarithmic; and the argument
  themselves  are  the  powers  of ten of the beginning and the end of
  that scale:  [-2 2] means from 10^-2 to 10^2.
. With  three  arguments,  the  scale  is  linear;  the first and last
  arguments  are  the minimum and maximum value, and the middle one is
  the  width  of  the  axis  intervals  where  a  label  and a "normal
  division"  line  will be inserted:  [0 1 10] means from 0 to 10 with
  labels and divisions every unit.
. With  four  arguments, the scale is still linear; the meaning of the
  first 3 arguments remains the same, and the fourth one is the number
  of sub-intervals in every "normal division":  for every one of these
  sub-interval,  a  line is drawn but no label is printed.  [0 2 10 4]
  means:   lower value 0, higher value 10, label and normal line every
  2 units, and each one of these "normal intervals" further divided in
  4 intervals.
- Then, insert a statement saying "drawsheet", to perform the drawing.
- Then,  insert  a  statement saying "showpage", to print the drawing;
  optionally,  if you are proficient in PostScript, you can overimpose
  graphs on the drawing before the "showpage" command.
- Print the file on a PostScript printer.

-----

     Enjoy!

     The  file millim.ps with its content is public domain, and can be
spread and modified as you want.

     Comments  and  modifications  are  gladly  accepted  via EMail to
loreti@padova.infn.it

                                                MLO

Maurizio Loreti (MLO) - Ham: I3NOO
Work:     University of Padova, Department of Physics
          Via F. Marzolo, 8 - 35131 Padova - Italy
DECnet:   VAXFPD::LORETI, i.e. 39330::LORETI
BITNET:   LORETI@IPDINFN
INTERNET: LORETI@PADOVA.INFN.IT