A trigram may also refer to Ba gua, 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_ 

This artificial intelligence-related article is a stub. You can help Wikipedia by expanding it. v • d • e