Count Words in a String

Count the number of words that appear within a character string.

StrCountW(x)

Arguments

x: a vector of strings to be parsed.

Details

This is just a wrapper for a fine regexpr. It uses the expression \b\W+\b to separate the words. The code \W is equivalent to [^[:alnum:]_]) wheras [:alnum:] contains [:alpha:] and [:digit:]. So everything that is not an alphanumeric character, a digit or a _ (underscore) is used as separator for the words to be counted.

Value

an integer defining the number of word in the string

References

http://stackoverflow.com/questions/8920145/count-the-number-of-words-in-a-string-in-r

Author

Andri Signorell <andri@signorell.net>, based on code from Adam Bradley <hisself@adambradley.net>

Examples

StrCountW("This is a true story!")
#> [1] 5

StrCountW("Just_one_word")
#> [1] 1
StrCountW("Not-just.one/word")
#> [1] 4

StrCountW("And what about numbers 8899 or special characters $$$/*?")
#> [1] 8
StrCountW("   Starting'n ending with some whitespace  ")
#> [1] 6

StrCountW(c("This is a", "text in more", "than one line."))
#> [1] 3 3 3