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     postmd - matrix display program for PostScript printers

     postmd [-b num] [-c num] [-d dimen] [-g list]  [-i list]  [-
     m num]  [-n num]  [-o list]  [-p mode] [-w  window] [-x num]
     [-y num] [file...]


     The postmd filter reads a series of floating  point  numbers
     from  files,  translates  them  into a PostScript gray scale
     image, and writes the results on the standard output.  In  a
     typical  application, the numbers might be the elements of a
     large matrix, written in row major order, while the  printed
     image  could help locate patterns in the matrix. If no files
     are specified, or if - is one of the input files, the  stan-
     dard input is read.

     The following options are supported:

     -b num          Packs the bitmap in the  output  file  using
                     num  byte  patterns.  A value of 0 turns off
                     all packing of the output file. By  default,
                     num is  6.

     -c num          Prints num copies of each page. By  default,
                     only one copy is printed.

     -d dimen        Sets the default matrix dimensions  for  all
                     input  files  to dimen. The dimen string can
                     be  given  as  rows  or  rowsx  columns.  If
                     columns  is  omitted it will be set to rows.
                     By default, postmd assumes  each  matrix  is
                     square  and  sets  the  number  of  rows and
                     columns to the square root of the number  of
                     elements in each input file.

     -g list         list is a comma- or  space-separated  string
                     of  integers,  each  lying between 0 and 255
                     inclusive,  that  assigns  PostScript   gray
                     scales  to  the  regions  of  the  real line
                     selected by the -i option.  255  corresponds
                     to white, and 0, to black. The postmd filter
                     assigns a  default  gray  scale  that  omits
                     white (that is, 255)  and gets darker as the
                     regions move from left to  right  along  the
                     real line.

     -i list         list  is  a  comma-,  space-,  or  slash(/)-
                     separated   string   of   N  floating  point
                     numbers that partition the  real  line  into
                     2N+1  regions.  The  list  must  be given in
                     increasing numerical order.  The  partitions
                     are used  to map floating point numbers read
                     from  the  input  files  into   gray   scale
                     integers  that are either assigned automati-
                     cally  by  postmd  or  arbitrarily  selected
                     using  the  -g  option. The default interval
                     list is -1,0,1, which partions the real line
                     into seven regions.

     -m num          Magnifies each logical page  by  the  factor
                     num.  Pages  are  scaled uniformly about the
                     origin which, by default, is located at  the
                     center  of each page. The default magnifica-
                     tion is 1.0.

     -n num          Prints num logical pages on  each  piece  of
                     paper,   where   num  can  be  any  positive
                     integer. By default, num is set to  1.

     -o list         Prints pages whose numbers are given in  the
                     comma separated list. The list contains sin-
                     gle numbers N and ranges N1 - N2. A  missing
                     N1 means the lowest numbered page, a missing
                     N2 means the highest. The page range  is  an
                     expression of logical pages rather than phy-
                     sical sheets of paper. For example,  if  you
                     are  printing  two logical pages to a sheet,
                     and you specified a range  of  4,  then  two
                     sheets of paper would print, containing four
                     page layouts. If you specified a page  range
                     of 3-4, when requesting two logical pages to
                     a sheet; then only page 3 and page 4 layouts
                     would  print,  and  they would appear on one
                     physical sheet of paper.

     -p mode         Prints files in either portrait or landscape
                     mode.  Only  the  first character of mode is
                     significant. The default mode is portrait.

     -w window       window is a comma- or  space-separated  list
                     of  four  positive  integers that select the
                     upper left and lower right corners of a sub-
                     matrix from each of the input files. Row and
                     column indices start at 1 in the upper  left
                     corner  and  the  numbers in the input files
                     are assumed  to  be  written  in  row  major
                     order.  By  default,  the  entire  matrix is

     -x num          Translates the origin num inches  along  the
                     positive x axis. The default coordinate sys-
                     tem has the origin fixed at  the  center  of
                     the  page,  with positive x to the right and
                     positive y up the page. Positive  num  moves
                     everything  right.  The default offset is  0

     -y  num         Translates the origin num inches  along  the
                     positive  y  axis. Positive num moves every-
                     thing up the page. The default offset is  0.

     Only one matrix is displayed on each logical page, and  each
     of  the  input  files  must contain complete descriptions of
     exactly one  matrix.  Matrix  elements  are  floating  point
     numbers   arranged  in  row  major order in each input file.
     White space, including newlines,  is not used  to  determine
     matrix dimensions. By default, postmd assumes each matrix is
     square and sets the number of rows and columns to the square
     root  of the number of elements in the input file. Supplying
     default dimensions on the command line with  the  -d  option
     overrides this default behavior, and in that case the dimen-
     sions apply to all input files.

     An optional header can be supplied with each input file  and
     is  used to set the matrix dimensions,  the partition of the
     real line,  the gray  scale  map,  and  a  window  into  the
     matrix.  The header consists of keyword/value pairs, each on
     a separate line. It begins on the first line of  each  input
     file  and  ends  with  the  first unrecognized string, which
     should be the first matrix element. Values set in the header
     take  precedence,  but apply only to the current input file.
     Recognized header keywords are dimension,  interval,  grays-
     cale,  and  window. The syntax of the value string that fol-
     lows each keyword  parallels what is accepted by the -d, -i,
     -g, and -w options.

     Example 1: Generating an interval list

     For  example,  suppose  file  initially  contains  the  1000
     numbers  in a 20x50 matrix. Then you can produce exactly the
     same output by completing three steps.

     1.  First, issue the following command line:

         example% postmd -d20x50 -i"-100 100" -g0,128,254,128,0 file

     2.  Second, prepend the following header to file:

         example% postmd -d20x50 -i"-100 100" -g0,128,254,128,0 file

     3.  Third, issue the following command line:

         example% postmd file

     The interval list partitions the real line into five regions
     and  the  gray  scale  list  maps  numbers less than -100 or
     greater than 100 into 0 (that is, black),  numbers equal  to
     -100  or  100  into  128  (that  is,  50 percent black), and
     numbers between -100 and  100  into  254  (that  is,  almost



     The following exit values are returned:

     0               Successful completion.

     non-zero        An error occurred.

     See attributes(5) for descriptions of the  following  attri-

    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    | Availability                | SUNWpsf                     |

     dpost(1), postdaisy(1), postdmd(1), postio(1), postprint(1),
     postreverse(1), posttek(1), attributes(5)

     The largest matrix that can be  adequately  displayed  is  a
     function  of  the interval and gray scale lists, the printer
     resolution, and the paper size. A 600 by 600  matrix  is  an
     optimistic upper bound for a two element interval list (that
     is, five regions) using 8.5 by 11 inch paper on  a  300  dpi

     Using white (that is, 255) in a  gray  scale  list   is  not
     recommended  and  won't show up in  the legend and bar graph
     that postmd displays below each image.

Man pages from Solaris 10 Update 8. See docs.sun.com and www.oracle.com for further documentation and Solaris information.