Checks if the character string may be used as an n-gram and its notation follows specific convention of biogram package.

is_ngram(x)

Arguments

x

character string representing single n-gram.

Value

TRUE if n-gram's notation is correct, FALSE if not.

Examples

print(is_ngram("1_1.1.1_0.0"))
#> [1] TRUE
print(is_ngram("not_ngram"))
#> [1] TRUE