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" (do NOT write the " quotes).
- 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 names of the variables  holding the
  paper sizes; 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 your 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).  Note that the default smallsize is 0.01 points,  or 1/7200 of
  an inch; lines defined as narrower than the printer resolution, will
  be printed at the printer resolution:  so that, on a 300dpi printer,
  also the default small lines will be 1/300th of an inch wides.
. "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 arguments
  themselves  are  the  powers  of ten of the beginning and the end of
  these scales:  [-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-intervals,  a line is drawn but no label is printed.  [0 2 10 4]
  means:  lower value 0, and higher value 10;  labels and normal lines
  every 2 units and each one of these 2 units normal intervals further
  divided in 4 sub-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.

     If you want to print more than 1 page, put at the end of the file
more than a single sequence of commands, from init to showpage.  To be
completely consistent  with the PostScript  programming language,  you
could also edit the statement "%%Pages: 1" in line 5,  substituting to
"1" the actual number  of pages;  and put statements like "%%Page 2 2"
before  every new printed sheet (i.e.  between every showpage  and the
next init). But this may not be actually needed, because most printers
do not really care about these statements.


-----

     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
BIX:      mloreti