Trigram

From Wikipedia, the free encyclopedia

A trigram may also refer to Bagua, a philosophical concept in ancient China. It may also refer to a three-letter acronym.

Trigrams are a special case of the N-gram, where N is 3. They are often used in natural language processing for doing statistical analysis of texts.

[edit] Examples

The sentence "the quick red fox jumps over the lazy brown dog" has the following word level trigrams:

the quick red
quick red fox
red fox jumps
fox jumps over
jumps over the
over the lazy
the lazy brown
lazy brown dog

And the word-level trigram "the quick red" has the following character-level trigrams (where an underscore "_" marks a space):

the  qui  k_r
he_  uic  _re
e_q  ick  red
_qu  ck_