Monster Media 1993 #2/Image.iso/math/lindo.zip/READ.ME

Text File | 1991-07-27 | 6KB | 199 lines

                            Getting Started with LINDO/PC

          Enclosed is  a  copy  of  LINDO/PC  for  the IBM PC. This version
          allows for 100 rows,  200  variables,  and 4000 nonzeroes. Larger
          versions of LINDO  for  386  machines  will allow for up to 32000
          rows  and  100000  variables.    Slack  variables,   explicit  or
          implicit, count against the maximum  variable  limit.  LINDO also
          needs some free nonzero space to optimize a  model.  The enclosed
          version of LINDO  does  not  contain  code  to  exploit  an 80x87
          coprocessor. All commands and  features  described  in  the LINDO
          User's Manual are present in the enclosed version  of  LINDO with
          the exception of the FORTRAN USER interface.

          In order to run this version you will require the following:

             (1) PC DOS version 2.0 (or higher)
             (2) 420000 bytes of available memory after loading DOS

          To determine if your PC has enough memory you should run  the DOS
          program CHKDSK. The  following  example  illustrates  how  to run
          CHKDSK and assumes you have placed your DOS diskette in drive A:

             A:                           (make drive A: the default)
             CHKDSK                       (run the CHKDSK program)

             362496 bytes total disk space
              38912 bytes in 2 hidden files
             316416 bytes in 42 user files
               7168 bytes available on disk

             655360 bytes total memory
             609960 bytes free            (this value MUST exceed 420000)

          If you  do  not  have  enough memory it may be due to two causes.
          Either you have not installed at least 640K on  your  machine  or
          you have resident  programs  and drivers installed that are using
          some of the  available  memory.  If  you  did  not  install these
          programs yourself, it could be they  are  automatically installed
          when the  system starts via the AUTOEXEC.BAT or CONFIG.SYS files.
          Please check these files.

          Before running LINDO, be sure to  make  a backup copy of the file
          LINDO.EXE first.

          After starting the machine and loading DOS, you may execute LINDO
          by placing the LINDO  system  diskette  in  the default drive and
          typing LINDO. If you have a hard disk you will  want  to copy the
          file  LINDO.EXE to a directory on your disk.  You  may  then  run
          LINDO directly from your hard disk.

          The  LINDO system disk also includes  several  test  problems  in
          files TEST1.DAT  to TEST6.DAT. A test problem, say TEST1.DAT, may
          be read into LINDO by giving the command "TAKE TEST1.DAT"  to the
          LINDO system prompt.












          LINDO provides on-line help capabilities for  all  commands. Help
          may be obtained by typing HELP or COMMANDS to the system Prompt.


          PRINTING LINDO/PC OUTPUT:

          LINDO output may be sent to the printer  using  several different
          techniques:

            1.  Simultaneously  holding  down the Shift  and  PrtSc  (print
                screen) keys  will cause the contents of the current screen
                to be sent to the printer.

            2.  Simultaneously holding down the  Ctrl  (control)  and PrtSc
                keys will cause all subsequent  screen output to be sent to
                the printer. Pressing Ctrl-PrtSc again stops printing.

            3.  The LINDO  command "DIVERT PRN" sends all high volume LINDO
                output to the printer rather than to the  screen.  Give the
                "RVRT" command to cause output to revert to the screen.

            4.  You may also use the DIVERT command to send LINDO output to
                a  file.  Do  this  by  giving  the  LINDO command  "DIVERT
                filename", where "filename" is any valid DOS file name. You
                may then exit  LINDO  and  edit  this  file  with  any text
                editor, and print it with the DOS PRINT command.

          Note: You may  not  print  the  LINDO files created with the SAVE
          command.  If  you  want  to  print  your  formulation,  type  the
          following:

             DIVERT PRN
             LOOK ALL
             RVRT


          NEW FEATURE(S):

          LINDO  now contains a full screen  editing  capability  which  is
          invoked  with  the  EDIT command.  Type HELP EDIT in LINDO to get
          specifics on the use of the EDIT command.

          LINDO can now display  a  status  box  during optimization.  This
          status box gives information  on  the  progress of the optimizer.
          The box is updated about every  two  seconds.  Use the escape key
          (<Esc>) to toggle the status box on and off.

          You  may also interrupt the optimizer by  pressing  the  end  key
          (<End>).  LINDO will ask how  many  more pivots you would like to
          do  once  the  end  key  has been pressed. To stop  optimization,
          respond by entering  0.    LINDO  will then return to the command
          level with the best solution found.




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          Thank you very much for your interest in LINDO. If  you encounter
          problems, please  document  them  as  thoroughly  as  possible by
          putting all the relevant data on a diskette and sending it to:

                                 LINDO Systems, Inc.
                                   P.O. Box 148231
                                  Chicago, IL 60614
                                    312/871-2524
















































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