1 XTAB_$

  Format:    

      XTAB  [input-file-spec] [command-file-spec] [report-file-spec]

  XTAB invokes the WESTAT CROSSTAB UTILITY, which calculates
 crosstabulations of columns in raw data files.  XTAB can do up
 to 100 crosstabs of up to 10 dimensions in one pass of the data
 file printing values, counts, percentages, cumulative
 counts, and cumulative percentages in a simple list format.
 The output report may be directed either to the terminal or
 to a report file.  Column definitions and labels are stored in a 
 command file for future use.  The command file layout is a simple
 ASCII file which may be changed with a text editor.  Maximum record 
 length is 20,000 characters and maximum field length is 40 characters.

  XTAB does very little conversion of data.  All tallies are given
 for data in raw ASCII character form sorted lexicographically.
 Generally XTAB outperforms SPSS by several magnitudes.  However,
 since the binary trees which XTAB uses for counts are unbalanced
 the algorithm degenerates to a list search and insert when the data
 has been sorted by the fields to be counted.

  Prompts from XTAB are self-explanatory.  The user should be able
 to work with XTAB after a little preliminary investigation.  For
 For further information contact Al Jaworski.
