This DOS executable version of PREFMAP plus a sample input file were
originally provided to various people by Phipps Arabie with the following
explanation.

For other information about PREFMAP, see the other PREFMAP entries
in the netlib/mds directory
                                         Joseph B Kruskal
-----------------------------------------------------------------
                                        Phipps Arabie
                                        3 December 1993

           PC (386) VERSION OF PREFMAP3 AT RUTGERS-GSM

     This diskette contains PREFMAP3.EXE and assumes a co-
processor.  Either copy it to the hard disk and then type
                         PREFMAP3

or run it (more slowly) from a floppy by typing, for example,

                         a:PREFMAP3

     The program will prompt you for the filenames (and paths are
optionally allowed) of all input and output files.  Note that all
input files must be ascii, with no left margin.  These should be
prepared using a text editor and saved in ascii mode.  PREFMAP3 has
no internal editor to prompt you for input data.  The diskette has
a sample input file, called "sample.dat", taken from page 48 of the
documentation.

     The output file will also be an ascii file, with the usual
FORTRAN carriage control conventions.  When you read the output
file with an editor, remember to: (a) declare that the file is to
be read as an ascii file, (b) set the horizontal margins to be as
narrow as possible, and (c) take care of carriage control.  

     Finally, it is to your advantage to print the output file in
"landscape" format and to use a small font size if one is available
to you.

     All input for the program is to be on unit 5 and all output on
6.  Thus, the fifth control card must have 5 for the first three
values and 6 for the last four.  That is, it should be

    5    5    5    9    8    6    6    6    6

and you might as well use 9 and 8 for the intermediate values. 
(Note that p. 48 of the documentation uses 0 where I have used 6
for the last four values.)

     If you are analyzing a very large data set, you may find the
program will issue a warning message and stop.  If that happens,
check back with me.

                           References

Meulman, J., Heiser, W., & Carroll, J. D. (1986). How to use
PREFMAP3. Unpublished manuscript, AT&T Bell Laboratories, Murray
Hill, NJ.

Carroll, J. D. (1972). Individual differences and multidimensional
scaling. In R. N. Shepard, A. K. Romney, & S. B. Nerlove (Eds.),
Multidimensional scaling: Theory and applications in the behavioral
sciences (Vol. 1, pp. 105-155). New York and London: Seminar Press.
(Reprinted in P. Davies & A. P. M. Coxon. (1984). Key texts on
multidimensional scaling. Portsmouth, NH: Heinemann.)

Carroll, J. D. (1980). Models and methods for multidimensional
analysis of preferential choice (or other dominance) data. In E. D.
Lantermann & H. Feger (Eds.), Similarity and choice (pp. 234-289).
Bern: Hans Huber.

.