What is n-gram?

N-gram is a continuous sequence of n items from a given sample text. It means that we have a given text and we have to consider some continuous n items. We can put any number in the position of n. If we take n=1 then it will be called 1-gram or unigram. If we take n=2 then 2-gram or bigram, similarly n=3 is 3-gram or trigram, and so on.


Example:
Here take a DNA sequence =AGCTTCAA

Let's see 1-gram or unigram:
A,G,C,T,T,C,A,A
Here we will take or consider one item at a time.

Let's see 2-gram or unigram:
AG,CT,GC,TT,TC,CG,GA,CA Here we will take or consider two items at a time.

Let's see 3-gram or unigram:
AGc,GCT,CTT,TTG,TGA
Here we will take or consider three items at a time.

Let's see another example:
Here we have a sentence: The sun is shining

Let's see 1-gram or unigram:
["The","sun","is","shining"]
Here we will take or consider one item at a time.

Let's see 2-gram or unigram:
["The sun","sun is","is shining"]
Here we will take or consider two items at a time.

Let's see 3-gram or unigram:
["The sun is","sun is shining"]
Here we will take or consider three items at a time.