Summary

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	File:     ngrams.icn

	Subject:  Procedures to produce n-grams

	Author:   Ralph E. Griswold

	Date:     March 20, 1998

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   This file is in the public domain.

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     The procedure ngrams(s, n, c, t) generates a tabulation of the n-grams
  in the specified string.  If c is non-null, it is used as the set of
  characters from which n-grams are taken (other characters break n-grams).
  The default for c is the upper- and lowercase letters.  If t is non-null,
  the tabulation is given in order of frequency; otherwise in alphabetical
  order of n-grams.

     For backward compatibility, the first argument may be a file, in
  which case, it is read to provide the string.

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This file is part of the (main) package.

ngrams(s, i, c, t)

: n-grams with count

ngramset(s, i, c)

: n-grams set